根据“公共劳务”收费法，对繁华阶段的机动车停车收费应采取的政策是()。

A.免费

B.平价政策

C.高价政策

D.低价政策

The entries in the official logbook must be signed by the master and（）.

A.the chief engineer

B.the person about whom the entry concerns

C.one other crew member

D.no other signature is required