单项选择题

W1: Good morning, Miss Irene. This is your first day to work here. I hope you will like your job.
W2: Good morning, Miss Jean. I think I’ll enjoy working with you.
W1: This is your desk. Sit down here please.
W2: Thank you.
W1: Miss Irene, your main duty is to answer phone calls and transfer them to the person wanted.
W2: I see. What if the person wanted is out
W1: In that Case, you are supposed to ask the caller to leave a message.
W2: Will I be responsible for keeping all the files in order
W1: Yes, you will. The secretary will do this with you.
W2: All right.

What is Irene’s main duty()

A、To see the letters.
C、To translate letters.
B、To answer and transfer calls.
D、To call the clients.