A、He will use a master key to open the door. B、He will get Ashley’s key from the woman. C、He will ask the department’s secretary

M: Physics Department, Doctor Benson speaking.
W: Hello, Prof. Benson, this is Natalie Kent calling, I’m living next door to your teaching assistant, Ashley Lake. [12]Ashley asked me to call you because she has lost her voice and can’t talk to you herself.  
M: Lost her voice? Oh, what a shame! Is there anything I can do for her?  
W: Well, she has a class this morning from 10:00 to 11:00 and she won’t be able to teach it, but she doesn’t want to cancel it either.
M: Want me to try to find somebody else to teach the class?
W: No, not exactly. [13]What she wants to do is to get someone .just to pass back the mid-term exams. She’s already marked them and they are on the desk in her office. The whole thing wouldn’t take more than ten minutes.
M: Her class from 10:00, eh? Well I think at that time I was going to be on campus anyway; [13]so I could do it for her. What room is her class in?
W: Wisdom Building, Room 301. Will you need her office key to get the exams? She’s given it to me and I could bring it to you.
M: Actually, that won’t be necessary. [14]We have a master key in the physics department. So I can get into her office.
W: Thank you very much, Prof. Benson. [15] Ashley doesn’t have another class to teach until Friday, and hopefully, she will be able to talk by then. She’ll call you as soon as she can.
M: Thanks for passing all the news about Ashley, and please tell her not to worry about anything.
12.Why doesn’t Ashley give the man a call herself?
13.What will the man do for Ashley?
14. How will the man enter Ashley’s office?
15.What do we know about Ashley according to the conversation?