Physics is the present-day equivalent of what used to be called

Physics is the present-day equivalent of what used to be called natural philosophy, from （）most of present-day sciences arose.

A、

that                              

B、

what 

C、

all                               

D、

which

【正确答案】：D
【题目解析】：

考查定语从句。当关系词前有介词时，用which不用that。句意：物理学在当今相当于过去被称为自然哲学的东西，现代的大多数科学都起源于此。