Consider the following statements about relevant costing and activity-based costing: I. The concept of relevant costs and benefits cannot be used in conjunction with an activity-based costing system. II. The concept of relevant costs and benefits must be modified for use with an activity-based costing system. III. Generally speaking, the decision maker can better associate relevant costs with the activities that drive them under an activity-based costing system than under a conventional product-costing system. Which of the above statements is (are) true?

I only.

II only.

III only.

I and II.

II and III.