The Receiving Clerk at Wattana Technologies Examines Incoming Shipments and Checks

The receiving clerk at Wattana Technologies examines incoming shipments and checks their purchase order numbers.A receiving report is then sent to accounts payable,where it is reconciled with the relevant purchase orders and invoices and payment is authorized.Which of the following would correct control weaknesses related to the clerk's activities?

A) Controls are adequate under the current system.
B) Vendor invoices should be approved for payment by the purchasing manager.
C) Purchase orders and receiving reports should be reconciled by the purchasing manager.
D) Vendor invoices should be approved for payment by the shipping clerk after the purchase order and receiving report are reconciled.