W: Hi, Peter, haven't seen you for ages. M: Hi, Cathy. I've been busy with my book. W: Haven't finished yet? M: I will have in a few days. W: Are you going to advertise it yourself? M: Hmm, some friends suggested I should, but I'm still in two minds about it. W: If I were you, I would. M: Thank you for your advice. I think I'll market it., Question: What has the man been doing? (A) Writing a book. (B) Reading a book. (C) Advertising a book.
(A) Writing a book.