A. The user creates a purchase order when purchase order is approved SAP Ariba procurement transmits it to the suppliers

B. The user creates a requisition when the requisition is approved, SAP ariba procurement generates a purchase order and transmit it to the suppliers

C. The user creates a requisition when the requisition is approved a procurement buyer creates a purchase order and transmits it to the supplier

D. The user creates a purchase order, when the purchase order is approved, a procurement buyer transmit it to the supplier