we discussed when estimating the predetermined OH rate, companies should choose a "reasonable" activity base. An activity base is reasonable when it satisfies two criteria. Which of the following is true according to the criteria? a. b. C. d. As the activity base increases, the overhead costs should also increase. As the activity base increases, the overhead costs should decrease. As the activity base increase, the overhead costs should not change. As the activity base increases, the overhead costs could increase or decrease