In QBO,how Are the Open Purchase Orders Report and the Physical

In QBO,how are the Open Purchase Orders report and the Physical Inventory Worksheet different?

A) Open Purchase Orders compares inventory on hand in QBO with what was ordered and the Physical Inventory Worksheet represents purchase orders that were received.
B) Open Purchase Orders represents purchase orders for items ordered but not yet received and Physical Inventory Worksheet compares inventory on hand in QBO with a confirmation of what was sent by our vendors.
C) Open Purchase Orders represent purchase orders for items ordered but not yet received and the Physical Inventory Worksheet compares inventory on hand in QBO with a physical count of goods.
D) Open Purchase Orders represent purchase orders for items ordered but not yet received and the Physical Inventory Worksheet compares inventory on hand in QBO with what is physically required to meet customer demands.