LSAT逻辑题分析:还是充分必要条件

Monroe, despite his generally poor appetite, thoroughly enjoyed the three meals he ate at the Tip-Top Restaurant, but, unfortunately, after each meal he became ill. The first time he ate an extra-large sausage pizza with a side order of hot pepper: the second time he took full advantage of the all-you-can-eat fried shrimp and hot peppers special and the third time he had two of Tip-Top's giant meatball sandwiches with hot peppers. Since the only food all three meals had in common was the hot peppers. Monroe concludes that it is solely due to Tip-Top's hot peppers that he became ill.
21. If both Monroe's conclusion and the evidence on which he bases it are correct, they would provide the strongest support for which one of the following?

(A) Monroe can eat any of Tip-Top's daily all-you-can-eat specials without becoming ill as long as the special does not include the hot peppers.

(B) If, at his third meal at Tip-Top, Monroe had chosen to eat the baked chicken with hot peppers, he would have become ill after that meal.

(C) If the next time Monroe eats one of Tip-Top's extra-large sausage pizzas he does not have a side order of hot peppers, he will not become ill after his meal.

(D) Before eating Tip-Top's fried shrimp with hot peppers special, Monroe had eaten fried shrimp without suffering any ill effects.

(E) The only place Monroe has eaten hot peppers has been at Tip-Top.

答案是B,如何排除A/C.

M: 还是充分必要条件的问题. 这里已经确认的是hot pepper是问题的根源. 但是原文没有提到的是hot pepper是唯一的原因. 所以hot pepper是充分非必要条件. 有HP就肯定sick, 没有HP不一定不sick.