How would you initiate a third-party order fulfillment process in the system?

How would you initiate a third-party order fulfillment process in the system?
A . By selecting "External" for the fulfillment field in the sales order logistics details in the Outbound Logistics Control work center.
B . By selecting an externally managed location as the ship-from site in the sales order item.
C . By selecting the "Source Of Supply Priority" rule as the procurement type in the planning tab of the material master.
D . By selecting "External" for the fulfillment field in a sales order item.

Answer: D