You are the project manager of a new project, which will construct a bridge on the River Nile in Egypt. Before initiating the project, you should （）.

A．create a scope management plan to document：how the project scope will be defined, verified and controlled

B．develop a project management plan

C．determine specific activities that need to be performed to produce the various project deliverables

D．facilitate the formal authorization to start a new project

胡萝卜素主要吸收（）。