— ______ is your new teacher?

— The one in the white shirt. [ ]

A. Whose

B. What

C. Which

D. Whom

对于服务星级在固定评级日的调整采取（）的管理方式

A、“当期升级，延期降级”

B、“当期降级，延期升级”

C、“当期不变，延期升级”

D、“当期不变，延期降级”