单项选择题

[听力原文]
W: Why do you think Harry Potter is so popular these years
M: Because there are not many good children’s books available.

What does the man mean()

A. He thinks children can be satisfied easily.
B. He thinks the publishers shouldn’t produce so many junk books.
C. He thinks we are short of good children’s books.
D. He thinks children have no taste at all.