Which of the following are rules for the router to check the RPF after receiving SA messages from the MSDP?
A . Check the RPF based on the source RP contained in the received SA message.
B . Check the RPF based on the next hop of the route that reaches the source R
D . Query the MBGP route and then the BGP route
E . Query the BGP route and then the MBGP route
Answer: A, B, C