Which One of the Following Statements Is Best

Which one of the following statements is best?

A) Demand alternatives adjust demand patterns, whereas capacity alternatives change in response to changes in demand.
B) Overtime and undertime are two ways to change the workforce level (rather than its utilization) .
C) Due to the almost limitless number of possible aggregate plans, it is virtually impossible to select a desirable plan without using an optimization procedure such as linear programming.
D) Subcontracting during the peak season is called a demand strategy since it requires a competitive orientation toward suppliers.