$3.$ If some but not all of the items on the purchase order have been received, and the bill has been created, A$.$ the purchase order is automattically marked as "closed" by QBO B$.$ the purchase order must be manually updated by checking the CLOSED column for each item received. C$.$ the purchase order remains open until the bill has been paid. D$.$ the purchase order remains open until all items have been received or the user manually closes the purchase order