Which technical aspects are part of an SAP Ariba Buying and Invoicing implementation? Note: There are 2 correct answers to this question.

Which technical aspects are part of an SAP Ariba Buying and Invoicing implementation? Note: There are 2 correct answers to this question.
A . Separate spend activities by entities
B . Filter information by Business Unit
C . Set up Catalog Constraints
D . Allow visibility control to items in the UI

Answer: A,C