What are two methods of ensuring that the multicast RPF check passes without changing the unicast routing table? (Choose two.)

Static mroutes (multicast routes) explicitly define the RPF interface and next hop for multicast sources, allowing the RPF check to pass independently of the unicast routing table by providing a direct lookup for multicast source reachability.

Disabling BGP would disrupt unicast routing and does not provide an alternative mechanism for the multicast RPF check.

MBGP (Multiprotocol BGP) allows BGP to exchange multicast-specific Network Layer Reachability Information (NLRI), enabling the PIM RPF check to use this distinct multicast routing information instead of relying solely on the unicast routing table.

Disabling an interface to the multicast source would prevent multicast traffic from entering the network entirely, not facilitate the RPF check.

Implementing OSPF would involve changing the unicast routing table, which the question explicitly states should be avoided.