单项选择题

A.①,②,③,④,⑤,⑥,⑦,⑧
B.①,②,⑥,③,④,⑦,⑧,⑤
C.①,②,⑥,③,④,⑤,⑦,⑧
D.①,②,③,⑤,④,⑥,⑦,⑧