— Fancy meeting you here!

— Pleased to see you. If they ________ me to the party, I ________ be here.[ ]

A. hadn't invited; wouldn't be          

B. didn't invite; wouldn't be

C. hadn't invited; wouldn't have been    

D. didn't invite; won't be

在层次分析法的递阶层次模型中，一般分为三层，其中，最下面一层称为（）。

A.准则层

B.目标层

C.方案层

D.指标层