Which two statements about IBGP multipath are true?

Which two statements about IBGP multipath are true? (Choose two.)
A. The IGP metric of the BGP next hop can be different from the best-path IGP metric if you configure the router for unequal-cost IBGP multipath.
B. The IGP metric of the BGP next hop must be the same as the best-path IGP metric.
C. The equivalent next-hop-self is performed on the best path from among the IBGP multipaths before it is forwarded to external peers.
D. The path should be learned from an external neighbor.
E. The router BGP process must learn the path from a confederation-external or external neighbor.
F. The router BGP process must learn the path from an internal neighbor.