【单选题】

Decomposition is the subdivision of project deliverables into smaller, more manageable components until the work and deliverables are defined at the work package level. This is a valuable tool for define scope. However, decomposition may not be possible for a deliverable or subproject if:

A、The deliverable or subproject is very complicateD、
B、The deliverable or subproject is already being produceD、
C、The deliverable or subproject will be accomplished after a very long time (i. e. far into the future).
D、None of the above:Decomposition of deliverables is always possible.