In situations where cost prohibits having separate physical links for VPN and Internet traffic, what are the two recommended methods for creating two logical links over a single physical link? (Choose two)

A.
The use of Frame Relay subinterfaces.

B.
The use of 802.1q trunking on LAN interfaces.

C.
The use of GRE tunnel interfaces.

D.
The use of PPP multilink interfaces.

E.
The assignment of two VRFs on the same physical interface.