— Could you tell me ___________? I must prepare for it.

— Well, it will start at 9:00 tomorrow morning. There is enough time for you.

A. why will the speech start

B. when the speech will start

C. where the speech will start

有条理地概述这些资料所反映的主要内容，字数不超过200字。要求：全面，有条理，有层次。