Which setting do the receivers’ routers require to support the IGMPV2 devices?

A company wants to enforce source-specific multicasting (SSM) for several multicast streams.
This is the configuration:
Some multicast receivers support IGMPv3.
Other receivers that need to stream support IGMPv2 only.
The multicast receivers’ default routers enable IGMPv3 on the interfaces associated with their subnets. The routers are correctly configured to enable the IGMPv3 receivers to receive the stream from the correct source
Which setting do the receivers’ routers require to support the IGMPV2 devices?
A. An SSM policy that selects the IGMPv2 devices and binds them to an RP address
B. An SSM map that sets a rendezvous point (RP) for each multicast address
C. An SSM policy that selects the appropriate multicast destinations and binds them to an RP address
D. An SSM map that sets the correct source for each multicast address

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