Which of the following is the proper sequence of events in an activity-based costing system? a. Calculation of pool rates, identification of cost drivers, identification of cost pools, assignment of cost to products. b. Identification of cost pools, identification of cost drivers, calculation of pool rates, assignment of cost to products. c. Identification of cost drivers, identification of cost pools, calculation of pool rates, assignment of cost to products. d. None of the answers is correct. e. Assignment of cost to products, identification of cost pools, identification of cost drivers, calculation of pool rates.