介绍期旅游企业营销策略可采用以下哪几种策略?（）。

A.高格调策略

B.高价策略

C.选择性渗透策略

D.低价策略

E.密集式渗透策略

A project manager believes that modifying the scope of the project may provide added value service for the customer. The project manager should （）.

A.assign change tasks to project members

B.call a meeting of the configuration control board

C.change the scope baseline

D.postpone the modification until a separate enhancement project is funded after this project is completed according to the original baseline