单项选择题

A.4×0.7×6×160×300+2×0.7×6×160×180
B.4×0.7×6×160×(300-10)+2×0.7×6×160×180
C.4×0.7×6×160×(300-10)+1.22×2×0.7×6×160×180
D.4×0.7×6×160×(300-2×6)+1.22×2×0.7×6×160×180