单项选择题

M: Hello, Susan, come in and take a seat.
W: Thank you.
M: The reason I want to see you is I’m worried about your grades. Last year you were a straight-A student, but over the last semester you hardly even get any B’s. I know that you’re a very bright student, so I wondered if you had any problem.
W: Thank you for your concern, Dr. Brown. I know I could be doing better, but my husband is working full-time now, so he can’t look after the kids so much. I always end up writing my assignments with two kids running round the room.
M: There is a kindergarten in the downtown campus. Why don’t you drop your kids in the kindergarten and then go and do your assignments in the library
W: Thank you. Maybe I’ll try that.

What is true about Susan()

A. She is a married student who always gets top grades.
B. She is a clever student who doesn’t like her children.
C. She is a medical student who doesn’t work hard enough.
D. She is a good student whose grades are affected by her children.