When switching from an activity-based costing system that contains some batch-level costs to a traditional costing system: Select one: O a. the unit product costs of both high and low volume products typically increase. O b. the unit product costs of both high and low volume products typically decrease. O c. the unit product costs of high volume products typically decrease and the unit product costs of low volume products typically increase. O d. the unit product costs of high volume products typically increase and the unit product costs of low volume products typically decrease. e. None of the given