A、Claim his money back. B、Keep his invoice just in case. C、Get his computer repaired in the store. D、Back up the files. A请求建议题。男

M: Our English teacher gave me an "F" in the final exam last semester. It is the third time that she has given me an "F. "
W: As a matter of fact, it is not the teacher but you who decide whether you pass or fail in every exam.
Q: What does the woman mean?

M: I finally submit myself to the computer. It goes down the minute I log on.
W: You mean the one you bought last week? The store guarantees it can be changed or refunded within two weeks so long as you have the invoice.
Q: What should the man do according to the woman?