When a software measure reveals a wide gap between planned results and actual accomplishments and this is discovered late in the project schedule, why does adding more programming and staffing resources usually result in diminished return?

 A).It disrupts existing progress and on-going personnel collaboration.

B). It requires time to acquire additional space, hardware, and software.

C).The new employees usually cost more than their counterparts.

D).It makes negatively affects morale and makes present personnel feel unproductive.