听下面一段对话，回答下列问题。M: Hello, Professor Johnson.W: Hello, Tony. So what shall we work on todayM: Well, the problem is that this writing assignment isn’t coming out right. What I thought I was writing on was to talk about what particular sport means to me when I participate in.W: What sport did you chooseM: I decided to write about cross country skiing.W: What are you going to say about skiingM: That’s the problem. I thought I would write about how peaceful it is to be out in the country.W: So why is that a problemM: As I start describing how quiet it is to be out in the woods. I keep mentioning how much effort it takes to keep going. Cross-country skiing isn’t so easy as some people think. It takes a lot of energy, but that’s not part of my paper. So I guess I should leave it out. But now I don’t know how to explain that feeling of peacefulness without explaining how hard you have to work for it. It all fits together. It’s not like just sitting down somewhere and watching the clouds roll by. That’s different.W: Then you’ll have to include that in your point. The peacefulness of cross-country skiing is the kind you earn by effort. Why leave that out Part of your point you knew before hand but part you discovered as you wrote. That’s common, rightM: Yeah, I guess so. What difficulty does the man have while working on his essay（）

A. He can’t make up his mind whether to include the effort part of skiing,
B. How to describe the fabulous country view is beyond his knowledge.
C. He isn’t able to find a peaceful site to do the assignment.