M: Where is Joan? She said she would be here at three. And now it's three-thirty. She must have missed the train. W: I think so, but I hope she won't miss the next one. Otherwise, she should be late for the opening address of the conference., Question: What's the woman worried about? (A) Joan may have taken a wrong train. (B) Joan will miss the next conference. (C) Joan may be late for the opening speech.
(C) Joan may be late for the opening speech.