In this task, you will be shown a conversation and a question. You need to write an implausible answer to the question. Even though there exist multiple wrong answers, we only need a single wrong answer. "W" and "M" in the conversations stand for "woman" and "man".
One example: M: I am considering dropping my dancing class. I am not making any progress. W: If I were you, I stick with it. It's definitely worth time and effort., Question: What does the man suggest the woman do?
Solution is here: Take a more interesting class.
Explanation: This is a good example. Based on the conversation, the man thinks the dancing class is worth time and effort. So, the man doesn't suggest her to take a more interesting class and one of the wrong answers is "Take a more interesting class.".

Now, solve this: 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?
Solution:
Joan may have taken a wrong train.