1. The problem asks to identify the type of cost that will be incurred regardless of the decision made. 2. Let's define the options: - Avoidable cost: A cost that can be eliminated if a particular decision is made. - Relevant cost: A cost that will be affected by a decision. - Sunk or unavoidable cost: A cost that has already been incurred or cannot be changed by any decision. - Differential cost: The difference in cost between two alternatives. 3. Since the cost will be incurred regardless of the decision, it means it cannot be avoided or changed. 4. Therefore, the correct answer is "Sunk or unavoidable" cost. Final answer: Sunk or unavoidable