单选题 Letter B was written to tell that ______.

A、 you always bring a nice gift when you go to a dinner party
B、 you just watch the guests at a party and follow them, and don't be shy about asking questions
C、 the Americans and Canadians like having a lot of dinner parties
D、 if you follow a few rules of dinner parties, you will have a good time at the party

【正确答案】 D

【答案解析】[D]概括性最强，letter B全文就是围绕着怎么才能在请宴中have a good time进行展开的。