What is the difference between a federated model and an Authoritative source?

• The federated model, as a whole, is composed of the various configuration-controlled Authoritative Sources
• The individual Authoritative Source are subject to configuration control, but the federated model is not.
• The Federated model is configuration-controlled, but the authoritative sources are not.
• Changes to one Authoritative source never affect other Authoritative Sources in the federated model

Please pic one of the four as the correct answer -Thank you