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".
M: Miss Smith, I told Dr. Brown that I would call him in the Houston office at ten o'clock by their time. Please find out the time difference for me so that I'll know when to place the call. W: It's two hours earlier in Houston, sir. I know without looking it up because my sister lives there.
A:
When should the man place his call to Houston? (A) At 8:00. (B) At 10:00. (C) At 12:00.