Tom knows the answerto this question.

问题描述:

Tom knows the answerto this question.
Tom knows the answerto this question.
A.So Tina does.
B.So does Tina.
C.Tina does so.
D.Does Tina so.
麻烦写下原因.

B
汤姆知道这个问题的答案. 缇娜也知道.