A、She’s going away for a while. B、She did well on the test. C、She worked hard and earned a lot of money. D、She’s didn’t have to

W: Why didn’t you have your geology class today?
M: Only three out of a class of twenty-five showed up. Since the professor had planned to present a complex demonstration, he decided to cancel the class until everybody could be present.
Q: Why didn’t the geology class meet today?

M: Congratulations. You certainly did quite well and I must say you deserve that grade.
W: Well, I really studied hard for that exam I’ve been preparing for it for more than a month. Now, I can relax for a while.
Q: Why is the woman so happy？