单选题 Although the sport is very popular, some people are still ______.

A、 expanding its equipment
B、 asking for instructions
C、 afraid of going down the mountainsides
D、 curious about the sport

【正确答案】 C

【答案解析】最后一段指出，虽然这项运动风靡一时，但仍然有人惧怕从山路上冲下来(may be chicken about schussing down mountainsides)；[A]并不与运动的普遍性构成让步关系；至于 asking for instructions 和 curious about the sport文中并未提及。