The origin is a mandatory attribute that defines the origin of the path information.
Which three options are valid origin attributes? (Choose three.)

A.
IBGP: NLRI is learned via intra-AS BGP.

B.
EBGP: NLRI is learned via inter-AS BGP.

C.
IGP: NLRI is interior to the AS of origination.

D.
EGP: NLRI is learned via EGP.

E.
INCOMPLETE. NLRI is unknown or learned some other way.