[求助]费费逻辑笔记2-1-2-1

例1. Because incumbent members of Congress are given a great deal of attention by the news media and because they enjoy such perquisites as free mail privileges and generous travel allowances, incumbents enjoy an overwhelming advantage over their challengers in elections for the United States Congress.
Which of the following, if true, best supports the claim above?
(A) In the last congressional elections, incumbents met with a larger number of lobbyists than did challengers.
(B) In the last congressional elections, 98 percent of the incumbents in the House of Representatives who were seeking reelection won.
(C) Incumbent members of Congress are frequently critical of the amount of attention given to them by the news media.
(D) The support that political station action committees provide to challengers for congressional seats often compensates for the perquisites enjoyed by incumbent members of Congress.
(E) Of all incumbent senators surveyed before the last congressional elections, 78 percent said that their challengers did not pose a serious threat to their chances for reelection.
答案是E。可是，我感觉B好像也说得过去。请问为何B不对？