I really didn’t understand____ made my son so sad this morning.

A．what was it

B．what it was that

C．it was what that

D．what was it that

工程项目咨询综合评价法所采用的理论依据不包括( )。

A．基于经验的综合评价方法

B．基于数值和统计的综合评价方法

C．基于科学理论的综合评价方法

D．基于决策和智能的综合评价方法