What is the purpose of implementing an implicit enhancement for a purchase order transaction in Ariba Network integration via CIG?

What is the purpose of implementing an implicit enhancement for a purchase order transaction in Ariba Network integration via CIG?
A . To handle the Purchase Order Change & Cancel scenario
B . To send accounting information in the purchase order
C . To enable service map key functionality
D . To filter out account assignment details based on the company code

Answer: A