Which One of the Following Statements Is Best

Which one of the following statements is best?

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