【单选题】

A project can best be defined as: 

A Series of non-related activities designed to accomplish single and multiple objectives. 
B Coordinated effort of related activities designed to accomplish a goal without a well- 
established end point. 
C Cradle-to-grave activities which must be accomplished in less than one year and consumes 
human and non-human resources. 
D Any undertaking with a definable time frame, well-defined objectives, and consumes both 
human and non-human resources with certain constraints. 
E All of the above.