单项选择题
W: You look exhausted this morning, Steve.
M: I am pretty tired. I stayed up nearly all night getting ready for a midterm exam this morning.
W: Have you gotten the results of the test yet
M: Yes, and unfortunately, my grade could have been much better.
A. It was an improvement.
B. It was disappointing.
C. It was unfair.
D. It was satisfying.