Does the interface whose address is used as BSR candidate require PIM enablement?

Does the interface whose address is used as BSR candidate require PIM enablement?
A .  Yes, that interface must be PIM enabled
B .  No, it is unnecessary to enable PIM on that interface
C .  If it’s a physical interface, that interface should be PIM enabled, otherwise it is unnecessary
D .  If the RPF check is using the multicast routing table, that interface should be PIM enabled, otherwise it is unnecessary

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Answer: A