— Why didn't you remind him of the possible danger?  

— But what ________ otherwise? He never listens to me. [ ]

A. could I do

B. could I have done

C. should I do    

D. must I have done

新建一幢教学大楼，建筑面积为4800m²，而类似工程的建筑面积为3200m²，预算成本892600元，类似工程各种费用占预算成本的权重是：人工费6%、材料费56%、机械费12%、措施费5%、间接费14%、其他费8%；拟建工程地区与类似工程地区造价之间的差异系数为K₁=1.04、K₂=1.06、K₃=0.98、K₄=1.03、K₅=0.86、K₆ =1.02；利税率12%则该拟建工程的概算造价为( )元。

A．1182816

B．1432875

C．1540206

D．1954021