Hereinafter GREVPN and BGP / MPLS VPN described above are correct ____ .

Hereinafter GREVPN and BGP / MPLS VPN described above are correct ____ .
A . Both can separate the address space
B . both point to point tunnel
C . GREVPN does not separate address space, BGP/MPLS VPN can separate address space
D . GRE VPN can provide advanced security such as data encryption, but BGP/MPLS VPN cannot provide such security.

Answer: C