Last year, I liked playing volleyball, but now I get used to ______. [ ]

A. going swimming

B. playing guitar

C. listen to music

( )是指商品流通企业把经营战略的重点放在一个特定目标市场上，为特定的地区或特定的购买者群体提供某种特定的商品和服务的战略。

A．成本领先战略

B．差异化战略

C．专一经营战略

D．特定目标战略