Which two protocols are most often deployed in Cisco IP NGN multiservices core networks to support services like VPNs?

Which two protocols are most often deployed in Cisco IP NGN multiservices core networks to
support services like VPNs? (Choose two.)

A.
MPLS

B.
GRE

C.
mGRE

D.
SSL

E.
VTI

F.
multiprotocol BGP