下列选项中，属于工程质量事故原因中设计计算差错的是（）

A.设计考虑不周

B.施工方案考虑不周，施工顺序颠倒

C.结构构造不合理

D.盲目套用图纸

E.图纸未经会审，仓促施工

For our both benefit, we are grateful to you for thinking about our suggestion.

A．our both benefits

B．the benefits of both of us

C．our benefits of both

D．our benefits of our two sides