A tolerance range is set, if the tolerance range is too narrow on a program what effect will multiple minor changes have on the program?

One of the constituent project managers asks a new program manager to obtain approval for an additional key project requirement.

A tolerance range is set, if the tolerance range is too narrow on a program what effect will multiple minor changes have on the program?
A . Reduction in program quality
B. Degradation of program communications
C. Reduction in program risk
D. Slowdown in program implementation

Answer: D