Which of the Following Is True Concerning Sales and Operations

Multiple Choice

Which of the following is true concerning sales and operations planning?

A) Once the plan is finalized, it should not be changed during the planning period.
B) There is a specific set of steps all firms should follow in the sales and operations planning process.
C) A benefit of the process is that the firm should achieve high service levels with lower inventory.
D) All of these are true.