The amount of increase or decrease in cost that is expected from a particular course of action as compared with an alternative is

A) period cost
B) product cost
C) differential cost
D) discretionary cost

The amount of increase or decrease in cost that is expected from a particular course of action as compared with an alternative is called differential cost. Differential cost is important in decision-making as it helps to determine the best course of action by comparing the costs of different alternatives. Period cost refers to cost that is not directly related to the production of goods, such as administrative expenses. Product cost includes direct materials, direct labor, and manufacturing overhead. Discretionary cost refers to expenses that a company chooses to incur, such as a charitable donation.