Choose two commands that are required to enable multicast on a router, when it is known that the
receivers use a specific functionality of IGMPv3. (Choose two.)

A.
ip pim rp-address

B.
ip pim ssm

C.
ip pim sparse-mode

D.
ip pim passive

Explanation:
Source specific multicast only works with IGMPv3
http://www.cisco.com/en/US/docs/ios/ipmulti/command/reference/imc_04.html#wp1043638