Jewelry______ becoming increasingly popular, in one form or anot

Jewelry______ becoming increasingly popular, in one form or another, among teenage guys.
A、 being
B、 are
C、 is
D、 been
【正确答案】：C
【题目解析】：该题考查的是主谓一致性。jewelry是不可数集合名词，做主语时谓语用单数，选项C为正确答案。