A、Because they found someone suspicious. B、Because the man lost the key of the safe. C、Because the woman lost a new design. D、Be

W: (8) John, are you sure you haven’t seen the missing file? I could have brought it into this office with some other files. Please have a look everywhere. It’s marked "Confidential" and it has a limited circulation.
M: Oh, Mary. Do go away. I’ve got much worse troubles than a lost file.
W: But it’s serious. (9-1) The file has got all the details of the new desk range. Mr. Parker says if anyone copied our designs, it could put the work on the new desks back at least a year! (9-2) And we’re supposed to be launching them at the International Office Equipment Exhibition.
M: Mary, please, something much worse has just happened.
W: Why, what’s the matter?
M: (10-1) I’ve got the security officer coming up in a minute. It’s just a matter of a loss of $ 300 in cash.
W: Oh, no! When did that happen, and how?
M: (10-2/11-1) Somebody came in this morning, bought $ 300 worth of office furniture and paid in cash.
W: (11-2) How odd. Don’t most people pay by cheque?
M: Yes, usually, well, there was no one in the Accounts Department, so I went to get the key of the safe. When I got back, the money had gone.
W: How terrible, John. Is it your responsibility? Will they expect you to replace the money?
M: Well, I haven’t got $30, let alone $300... Oh, here’s the security officer now.
W: Oh, before you start, I’m afraid I have to report the loss of an important file. It’s a very serious matter.
Questions 8 to 11 are based on the conversation you have just heard.
8. What does the woman want the man to do for her?
9. What will the speakers’ company launch at the International Office Equipment Exhibition?
10. Why is the security officer coming up soon?
11. What does the woman think of the person paying in cash?