How does the system support this scenario?

In your project. You work with a network and external activities. You have created a purchase requisition. The corresponding purchase order is created as well. Now, you increase the quantity of the external activity.

How does the system support this scenario?
A . The purchase order can be updated in Goods Receipt for Purchase Order (MIGO)
B . The purchase order is updated automatically to match the new quantity while saving the project.
C . A workflow can be triggered to inform the purchasing group.
D . The system automatically creates a new purchase requisition with the difference to the original quantity

Answer: B