What did the author's mother suggest as the right way for the Chinese to respond at the dinner table in America?
A.
They should say indirectly whether they want to have anything or not, rather than directly refuse or accept it.
B.
They should say directly whether they want to have anything or not, rather than refuse for the sake of politeness even if they in fact want to eat it.
C.
They should take whatever they want to eat, and beat around the bush to ask the host to prepare more dishes so that they can pack up and take away.