单项选择题

Man: Mother says that she will take us to the National Park this weekend, and the Fragrant Hills for a picnic after the exam.
Woman: That’s too good to be true. I’ll be delighted if she does not give me more assignments to do.
Question: What can we learn from the conversation

A.The mother usually takes her child for sightseeing after a test.
B.The child is glad to be awarded a tour if he does well in an exam.
C.The mother often asks her child to work on something other than the school assignment.
D.There will be a lot of fun after the exam.