---You are quite different from your sister.

---Yes. We are both short. But my eyes are ________ than ________.

A．much bigger, his

B．more big, hers

C．bigger, hers

D．much bigger, him

夏某与杨某是针织厂仓库的保管员，某天晚上，两人因在库房里吸烟，烟头扔掉后没有踩灭，严重违反规章制度，引起库房失火，造成价值5万元的损失，夏某与杨某的行为构成了什么犯罪( )

A．共同犯罪

B．不是共同犯罪

C．重大责任事故罪

D．渎职罪