Karen West Owns a Barbecue Restaurant

Multiple Choice

Karen West owns a barbecue restaurant. One expense that Karen watches closely is the cost of propane, which she uses to heat her ovens. The more barbecue food Karen sells, the more it costs her for propane on a monthly basis. For Karen, the cost of propane is a(n) ________ cost.

A) variable
B) secondary
C) resultant
D) fixed
E) irregular