How Does Aggregate Planning for Services Differ from Aggregate Production

Multiple Choice

How does aggregate planning for services differ from aggregate production planning for products?

A) There is no difference.
B) Demand for products typically is stated as the number of hours of labor required,whereas demand for services is generally stated as the number of units of service desired.
C) Most service plans are based primarily on labor requirements.
D) Service plans make extensive use of inventory to meet demand.