Which of the following statements about aggregate planning is true? O a. Work station loading and job assignments are examples of aggregate production planning O b. Advertising/promotion is a way of manipulating product or service supply O c. Overtime/idle time is a way of manipulating product or service demand O d. Aggregate planning uses the adjustable part of capacity to meet production requirements What information does a master production schedule provide that an aggregate plan does not? a. A specific machine schedule for each order O b. Revenue information for the planning period O c. Specific product family production information O d. Expense information for the planning period