【单选题】

In preparing a good project definition, experienced project managers will: 

A Concentrate mainly on the end product rather than costs or benefits. These come later. 
B Realize that only the "tip of the iceberg" may be showing. As a project manager, you must 
get beneath it. 
C Understand that a project definition/plan is a dynamic rather than static tool, and thus 
subject to change. 
D Try to convert objectives into quantifiable terms. 
E All of the above