________ 200BC, the Silk Road, which was the route for trade between the East and the West, was in use.

A．As early as

B．As far as

C．As long as

D．As well as

事故发生单位主要负责人未依法履行安全生产管理职责，导致事故发生的，发生一般事故的，处上一年年收入（）的罚款。

A、30% 

B、40% 

C、60%