What _____ the forest of the USA in the last 350 years?[ ]

A. has happened to

B. is happened to

C. has happened at

D. is happening

一个规范性的全面的战略管理过程可分为( )。

A．战略分析阶段

B．成本选择阶段

C．战略评价阶段

D．战略实施阶段

E．战略控制阶段