What can the customer do so that multicast traffic is NOT flooded to all sites?

A customer is using a service provider to provide a WAN backbone for a 30-site network.

In establishing the network, the customer must work within these constraints:

. The customer has a self-managed MPLS backbone.

. The VPLS WAN backbone of the service provider does not support PIM snooping.

. Multicast VPN must be used for multicast support inside some VRFs.

What can the customer do so that multicast traffic is NOT flooded to all sites?
A . Configure static GRE tunnels and run the MPLS and multicast VPN inside these GRE tunnels.
B . Use Label Switched Multicast for the multicast transport.
C . Use PIM-SSM as the multicast routing protocol with IETF Rosen Draft multicast VP
E . Configure a static mapping between multicast addresses and MAC addresses.
F . Use GET VPN to encrypt the multicast packets inside the WA