Which three statements about bidirectional PIM are true? (Choose three)

A.
Traffic for a bidirectional group flows along the one shared tree and simultaneously utilizes
multiple paths in a redundant network topology.

B.
It does not require any traffic signaling in the protocol

C.
Membership to a bidirectional group is signaled using explicit Join messages.

D.
It maintains source-specific forwarding state.

E.
It reduces memory, bandwidth, and CPU requirements

Explanation:
Reference: http://www.cisco.com/en/US/docs/ios/12_1t/12_1t2/feature/guide/dtbipim.html