18. Among the following sentences, the one with clear semantics and no ambiguity is (). A. Xiao Wang returned to the dormitory and found Lao Zhu and his friends still sitting there chatting.

B

His friends may be friends of Lao Zhu or Xiao Wang.

C's own house may be his own house or mine.

Chairman d is glad to meet the general manager, either the chairman or the general manager.

I wish you progress in your study.

Hope to adopt thank you.