Which two statements about the Compressed Real-Time Transport Protocol (CRTP) are correct regarding the J-series router?

Which two statements about the Compressed Real-Time Transport Protocol (CRTP) are correct regarding the J-series router? (Choose two.)

A.
CRTP can only be configured on non-multilink interfaces.

B.
CRTP can only be configured on multilink interfaces.

C.
CRTP options are configured on an ls- interface.

D.
CRTP operates between two directly-connected routers.