In activity-based costing, the total activity in an activity cost pool can be computed by: A) multiplying the total overhead cost in the activity cost pool by the activity cost pool's activity rate. B) dividing the activity cost pool's activity rate by the direct labor-hours required to make a product. C) multiplying the activity cost pool's activity rate by the direct labor-hours required to make a product. D) dividing the total overhead cost in the activity cost pool by the activity cost pool's activity rate