Final answer:
A differential cost is a cost that differs according to the alternative activity being considered.
Step-by-step explanation:
The correct answer is C. differential cost.
A differential cost is a cost that differs according to the alternative activity being considered. It represents the difference in costs between two alternatives. For example, if a company is deciding between two manufacturing methods, the differential cost would be the additional costs incurred by choosing one method over the other.
Let's say a company is considering two ways to produce a product - Method A and Method B. The cost of raw materials, labor, and utilities would be the same for both methods. However, Method A requires an additional piece of equipment that costs $10,000, while Method B does not require this equipment. Therefore, the cost of the equipment in Method A is a differential cost.