Which statement is true about Layer 2 zones when implementing transparent mode security?

A.
All interfaces in the zone must be configured with the protocol family mpls.

B.
All interfaces in the zone must be configured with the protocol family inet.

C.
All interfaces in the zone must be configured with the protocol family bridge.

D.
All interfaces in the zone must be configured with the protocol family inet6.

Explanation:
(page no 12) http://www.juniper.net/techpubs/en_US/junos12.1×44/information- products/pathwaypages/security/security-layer2-bridging-transparent-mode.pdf