How is a subcontract purchase requisition in SAP S/4HANA Cloud created? Note: There are 2 correct answers to this question.

How is a subcontract purchase requisition in SAP S/4HANA Cloud created? Note: There are 2 correct answers to this question.
A . Manually by a supplier
B. Automatically by a production order
C. Automatically via Material Requirements Planning (MRP)
D. Manually by a requester

Answer: BC