This passage has too many long sentences. I’m afraid they will be hard for most of the students. Could you   help to _______ them?

A．simplify

B．take

C．destroy

D．mix

PIP的核心目的是( )。

A．提供互动式的文档管理

B．促进项目参与各方的信息交流

C．促进项目参与各方的协同工作

D．为项目建设增值