【正确答案】 A

【答案解析】[听力原文]
W: Hello, this is Mary speaking.
M: Hi, Mary. This is Owen.
W: Ah, my dear editor. What"s up?
M: I am calling to tell you that the book you sent me has been approved to be published.
W: Really? That"s good news. I can"t believe my ears. Since the day I put the manuscript into the post box, I have been counting the days. Am I daydreaming? Tell me, do you really think the book is good enough to be published?
M: I have no doubt about it. And I am sure it"s going to be a bestseller.
W: Oh, I don"t know what to say now. Thank you so much. When is it going to be published?
M: Don"t be in such a hurry. Before the publishing, we need to meet and there are some places that I feel can still be improved.
W: No problem. I am looking forward to learning from you and getting some professional opinions.
M: Oh, you are so polite and humble. I think we can have a discussion and learn from each other.
W: How about tomorrow morning? I can go to your office.
M: Oh, I"m sorry. There is another call coming in. I have to hang up soon. Can you come here at about 9:30?
W: All right. No problem.
M: My secretary is going to call you to confirm the appointment. I hope to see you tomorrow.
W: See you.

What is the relationship between the two speakers?