A、Because they lack self-discipline in their studies. B、Because they spend too much time on the Internet. C、Because they have no

W: We’re talking this hour about how and why people might become addicted to the Internet. (22)Dr.James at Maryland University has put together a support group for students who find themselves addicted to the Internet. He joins me now from his office in College Park.
M: Thank you very much for inviting me.
W: Is Internet addiction a relatively new thing?
M: Well, some may have been addicted for a while.
W: How does it present itself?
M: Well, some of them have issues like relationship problems, (23)or problems maintaining their grades because they are spending so much time on the Net.
W: But I think the computer is a very positive thing. How do I know when my impulse to go online will turn me into an Internet addict?
M: Uh...I’m not sure the exact amount of time is really the issue, (24)but I think if it begins to affect other areas of your life, such as your work or school performance. One of the problems with the Internet, is that people start losing some of the skills that make relationships successful. (24)If you are beginning to feel anxious or depressed or empty or lonely and you know you really look forward to those times when you can be online to be connected with other people in that way, then, a serious issue is starting to happen.
W: What if you start giving up other things, like going out for a walk...is that a symptom?
M: Well, (25)I think it’s helpful to have some sort of balance in your life. If you can, spend some time on the Internet and then go out and take a walk.
W: So that’s how we can avoid Internet addiction. Thank you very much, Dr.James.