A)He finds the presentation hard to follow.
B)He speaks highly of the presentation.?
C)He considers the presentation very dull.
D)He thinks Professor White has chosen an interesting topic.
原文：
W:Professor White's presentation seemed to go on forever.I was barely able to stay awake.?
M:How could you sleep through it?It is one of the best that I have ever heard on this topic.?
Q:What does the man think of Professor White's presentation?