What can you assign to the purchase requisition to be used as a source of supply in SAP Materials Management?

You convert a purchase requisition to a purchase order.

What can you assign to the purchase requisition to be used as a source of supply in SAP Materials Management? There are 2 correct answers to this question.
A . Quota arrangement
B . Contract
C . Desired vendor
D . lnfo record.

Answer: B,D