About 300,000 people climb Mount Fuji each year, according to the Japan National Tourism Organization, crowding into a brief summer climbing season.
A. most of them
B. most of whom
C. most of which
D. most of where
网友回答
(答案→)A. most of them
B. most of whom
C. most of which
D. most of where
解析：这不是一个从句，而是现在分词作状语，故选A。