A、He doesn’t understand his staff. B、His computer doesn’t work properly. C、He doesn’t know how to apply computer theory. D、He is

W: Do you have an address where I can write to you?
M: No, I’ll be off camping in the mountains most of the time. But if you write to me at my uncle’s house, he’ll hold my mail until I get there.
Q: What will the man probably do?

W: Jack, I’m having difficulty with all the theoretical stuff we’re getting in our computer course.
M: Oh, that part I understand. What I can’t figure out is how to make it work on my program.
Q: What is Jack’s problem?