单项选择题

Conversation 2
[听力原文] 8-10
W: Good afternoon. ABC company. May I help you
M: Yes. may I speak to Mr. James Potter. please
W: I’m afraid Mr. James Potter isn’t available right now. Would you like to leave a message
M: This is Martin Richard with Sun Electronics. It’s very important that he returns my call this afternoon.
W: Does he have your office number and your mobile phone number
M: I think so. but let me give them to you again.
W: Okay.
M: My office number is 714-888-3765; my cell phone number is 909-333-8739. He can reach me at my office number before 6:00 p. m. or anytime today on my mobile.
W: Very well. I’ll give him your message as soon as he returns to the office.

At what time can Mr. James Potter call Martin Richard on his mobile()

A.Before 6:00 p. m.
B.After 6:00 p. m.
C.Anytime that day.
D.Anytime.