I can't understand why you all ____ think that I did it. （c） A. shall B. will C. can D. should

I can't understand why you all ____ think that I did it. （c）
A. shall B. will C. can D. should

答案错啦,应该是D.should
should有“竟然”之意!

C. can
我不能理解为什么你们都会认为我做了那件事

答案不对。这里应该什么都不添。