听力原文：All right, so here is the conference agenda so far, Alan. On Monday, registration

and reception will be from 8 to 10 p. m. , and starting at 9 a. m. the following morning, the conference will start with the opening ceremony, and then you' II give your keynote address; then after a 30-minute break, Matthew will give his talk on motivation in the workplace at 11:30. We' II break for lunch, and the conference will resume at 2:00 p. m. , at which time Linda and Mike will give their presentation on office layout and optimal efficiency in the workplace. An hour and a half is allotted for their presentation; afternoon workshops follow, and the conference will close at 5:30 p. m. to begin the following day with a continental breakfast. Cindy will begin her keynote address on competition in the industry at precisely 9 a. m. We' II break at 10: 30 for half an hour and resume with Nancy' s keynote address. And that' s as far as I' ve gotten.

When does the conference itself start？

A．Monday morning

B．Monday evening

C．Tuesday morning

D．Tuesday evening