Sunk Costs Are Different from Other Concepts of Costs in That

Multiple Choice

Sunk costs are different from other concepts of costs in that they

A) can be either variable or fixed.
B) cannot be lessened by choosing any particular course of action.
C) influence the decision of which activity to do or not do.
D) rise as the level of the activity rises.
E) must be included for an accurate cost-benefit analysis.