Speaker A: I can’t stand the school cafeteria. The food is terrible.
Speaker B: ().

A. I agree with you. It’s quite difficult to find a seat in the cafeteria.

B. Yeah, you will feel more comfortable if you sit down.

C. Yeah, but that’s not the worst thing about it. It’s also very dirty.

D. I don’t see why they don’t supply some seats for us.

按照产出的类型及来源划分，下列选项中不属于总供给的组成部分的是( )。

A．消费品供给

B．投资品供给

C．进口

D．出口