【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.