7. Which of the following statements is true about Activity Based Costing (ABC)? a. When a company implements activity based costing, overhead is ordinarily shifted from low volume products to high volume products. b. An activity based costing system is generally less costly, and easier to implement than conventional costing systems c. Activity based costing generally results in more accurate product costing than conventional costing , where only one predetermined overhead rate is utilized. d. More than one of the above statements is correct. e. None of the above statements are correct