36. In Paragraph 1, why do the authors include the information that the Alleghany mountains serve as a kind of boundary to the frontier?
(A) To make a statement about geo-politics
(B) To show how brave and unique Daniel Boone was since he lived beyond it.
(C) As a commentary on the relative bravery of frontiersmen.
(D) To show the pros and cons of different areas for living and exploring.

第一段後半部提到Allegheny Mountains過去是個多數白人定居者不敢跨越的界線 ; 第二段指出Boone在1769年才決定要跨越山脈去探險，代表（Ｂ）錯誤：

The Alleghany Mountains still marked a boundary beyond which the settlers dared not go； for west of them lay immense reaches of frowning forest, uninhabited by bands of warlike Indians. Occasionally some venturesome hunter or trapper penetrated this immense wilderness, and returned with strange stories of what he had seen and done. 

In 1769 Boone, excited by these vague and wondrous tales, determined himself to cross the mountains and find out what manner of land it was that lay beyond.