A、She hasn’t been getting adequate grades. B、She hasn’t been attending class every day. C、She has been coming to school much too

M: Oh, Janna, you’re early! I’m happy you’re here early today because I’d like to discuss your attendance for a moment.
W: Gee, Dr. Livingston, (13) I’m really sorry about missing class yesterday.
M: Actually, (13) it’s been several days.（女士解释说，抱歉，昨天没有来上课。男士说，并不仅仅是昨天，一共上过6 次课，已经缺了4 次。由此可见女士的问题在于并没有每天都来上课。）(14)Counting today, we’ve only had 6 classes, yet you’ve already missed 4.（从男士的话中可知，一共上过6 次课，女士一共缺了4 次。相减得到女士上课的次数为2 次。）It’s more than a half. You won’t be able to pass if you’re constantly absent. And I really don’t want to fail anyone.
W: Sorry, I’ve been extremely busy. I can explain for it. Dr. Livingston. I have a part-time job, so...
M: Well, I hope you’re already for today’s exam.
W: Today? I thought it was Monday!
M: Read the syllabus, Janna; this is precisely what I’m talking about. You should either make an effort to attend, or you should consider withdrawing while it’s still possible.
W: What do you mean?
M: Today’s the final day you can withdraw and get a full refund.
W: Maybe I really should. What do you suggest?
M: I wish you could attend classes regularly; however, if you don’t believe you’re capable of this, then don’t waste your money.
W: Thanks, Dr. Livingston. I really appreciate your advice. If it’s okay, (15) I suppose I’ll go ahead and drop the class.（女士说如果可行，就决定退课。可见女士打算放弃这门课程。）
M: It’s entirely up to you, but that might be best if you don’t think things are going to change. Excuse me, the students are coming, and I’ve got to get ready for class. I wish you the very best of luck, Janna.
W: Thank you, Dr. Livingston. Goodbye.
Questions 13 to 15 are based on the conversation you have just heard.
13. What is the woman’s problem?
14. How many classes has the woman attended?
15. What does the woman decide to do?