Every year, on July 4, the international "Nathan's Hot Dog Eating Contest" is held in Coney Island, New York. The contest was started in 1916, when four people raced to eat the most hot dogs to show how much they loved America. That year, the winner ate 13 hot dogs. For a period（一段時間）, whoever eats the most hot dogs in twelve minutes is the winner, but in 2008, the racing time was changed to ten minutes again because it was the racing time in 1916. A Japanese contestant, named Kobayashi Takeru, is the most famous of all. From 2001 to 2006, he ate an average of 50 hot dogs each year and remained （維持） the champion of the race. However, he became second from 2007 to 2009 because he lost the race to an American contestant named Joey Chestnut. Do you know how many hot dogs Joey ate in 2009? He ate 68 hot dogs. Wow, that's a lot.
【題組】47. According to the article, which is true about Kobayashi Takeru and Joey Chestnut?
(A) Kobayashi has been the winner for six years.
(B) Joey is a Japanese contestant.
(C) Kobayashi is an American.
(D) Joey has been the winner for nine years.