In decision making, opportunity costs are:

A) unimportant costs.
B) historical costs.
C) relevant costs.
D) future costs.

Opportunity Costs

The cost of forgoing the next best alternative when making a decision.

Relevant Costs

Costs that should be considered when making decisions, characterized by their occurrence in the future and variability depending on the decision made.

Historical Costs

The original monetary value of an asset or expense as recorded in the company's accounts at the time of the transaction, without adjustments for inflation.