Which profile option has the buyer failed to set up?

The buyer decides to automatically update and create sourcing rules, as part of the blanket
purchase agreement approval process. However, on clicking the Approve button, the buyer does
not see any option to update and create blanket purchase sourcing rules.
Which profile option has the buyer failed to set up?

A.
PO: Automatic Document Sourcing

B.
MRP: Default Sourcing Assignment Set