Which action configures phones in site A to use G.711 to site B, but uses G.729 to site C?

Which action configures phones in site A to use G.711 to site B, but uses G.729 to site C?
A . Configure Cisco Unified Communications Manager regions.
B . Configure Cisco Unified Communications Manager locations.
C . Configure transcoder resources in Cisco Unified Communications Manager.
D . Configure a gatekeeper.

Answer: A