Q: In this task, you will be shown a conversation. You need to write a question with three choices for the conversation. Your question should be answerable based on the conversation and only have one correct answer. Note that you don't need to answer your question. "W" and "M" in the conversations stand for "woman" and "man".
W: Hello, this is Mary speaking. M: Hello, Mary. This is Jack.
A:
What are they doing? (A) They are reading. (B) They are making a phone call. (C) They are cooking.