Which of the following best explains the main advantages of time-driven-activity-based costing for services over the use of conventional ABC? a. This type of costing allows service companies better information since their objectives when using ABC are different than those of manufacturing firms. b. The number of services can more easily be expanded than under conventional ABC, since costs are assigned to unused capacity. c. The number of line items on a services bill is minimized and practical capacity is used by time-driven-activity-based costing. d. Time-based resource and activity data is easy to collect and practical capacity is used by time-driven-activity-based costing. e. Theoretical capacity, used in this type of costing, allows service companies a better method to assess quality control than does conventional ABC.