72. Which of the following can be inferred from paragraph 1 about the cultivation of corn?
(A) It is very labor intensive
(B) It can be done with very simple tools.
(C) It is a major source of income for American farmers.
(D) It had not been practiced by Europeans before they came to the New World.

見文中"Corn, which is a...

...was grown by Native Americans centuries before the first Europeans ever stepped foot in thenNew World.在歐洲人踏入nNew World之前,當地美洲人就已經種植

An American Staple The origins of corn date back to roughly 1000 to 2000 B.C.E. in Mexico. Corn, which is actually a member of the grass family, was grown by Native Americans centuries before the first Europeans ever stepped foot in the New World. The cultivation(耕種) of corn spread among the Native American peoples throughout most of what is now the U.S. and large parts of South America. The importance of corn to the Native Americans was reflected in the numerous religious ceremonies and myths surrounding it. Corn, and by extension cornbread, was also important to the early American colonists, since corn was more available than wheat(小麥) at that time. The colonists learned how to cultivate and prepare corn for food from the Native Americans. Later, the pioneer(先驅) women that made the long trek(長途跋涉) across the nascent(萌芽的) country added their own cooking techniques. Cornbread was of particular importance to travelers, because it kept well and provided nourishment(營養) during the long journeys on foot or by horseback through virgin territory(未開發的領域). Cornbread even became known as journey cake at this time. Journey cake became johnnycake, the name by which cornbread is still known to this day by many people on the east coast. Early settlers also made cornmeal, which is basically flour(穀粉) ground from dried corn. It is a common staple(主要的) food even now. Cornmeal is very versatile(萬用的), and the kinds of bread that have been and can be made from cornmeal are virtually(實質上) endless. In the past, production of corn was very individual, with most southern farmers growing just enough corn to feed their livestock and themselves. When the farmers needed cornmeal, they visited their local mills(磨坊). These mills, which used large stone wheels to grind(磨) the corn, were located near rivers and other sources of water, because the wheels were initially powered by water. Hydropower(水力) was later replaced by gasoline(汽油) or electricity. The farmers paid the miller for the use of his mill by giving him a percentage of the cornmeal produced, which in turn, the miller sold to the local townspeople. As the production of cornmeal became increasingly industrialized, the mills gradually became obsolete(過時). Today, most cornmeal is produced in factories, where it is also bolted and fortified(強化) with vitamins and minerals, like most refined flours(精緻麵粉). Interestingly, each part of the country developed its own regional specialties and exhibited a bias(偏見) for a certain type of cornmeal. Northerners preferred yellow cornmeal, using flint yellow corn meal in their cornbread. Alternatively, southerners liked to use white cornmeal to make their cornbread. Each region also differed in its preparation of cornbread. Northerners like a sweeter version of cornbread, adding molasses(蜜糖) to the batter(麵糊), while southerners preferred the savory(鹹的) version that resulted when the cornbread was fried in cracklings(烤食物的劈啪聲). The steel ground yellow cornmeal commonly found in the northern part of the U.S. is produced by almost completely stripping(去除) the husk(外殼) and germ(胚芽) from the mature maize kernel(玉米粒) and grinding what remains of the kernel. The resulting product will keep almost indefinitely if sealed(密封的) tightly and stored in a cool dry place, because it no longer contains the natural oils that will oxidize(氧化) and become rancid(變質). Cornbread is much more consumed in the South, owing to the fact that wheat did not grow as well in the warmer climate of the southern states. In addition to these natural forces, the use of cornmeal in the South was likely given further impetus(促進) during the Civil War, when it became impossible to procure(提供) wheat supplies from the North. Hence, cornbread became popular during the Civil War because it was very cheap and could be made in many different sizes and forms. It was also a common lunch for poor children as late as in the mid 20th century. It is still a common side dish, often served with homemade butter, chunks of onion or scallions(蔥). Sometimes, cornbread is crumbled(粉碎) and served with cold milk similar to cold cereal in the South. Sometimes, cornbread takes on a distinct local flavor. For example, in Texas, the Mexican influence has spawned(產生) a hearty cornbread made with fresh or creamed corn kernels, jalapeño peppers and topped with shredded cheese(乳酪絲).