What could be the cause?

You are configuring VTIs in a clustered environment. On Peer A the VTI name is
VT_Cluster_GWA and on Peer B the VTI name is VT_Cluster_GWB. You find that the
route-based tunnel is not coming up. What could be the cause?

A.
All VTIs going to the same remote peer must have the same name.

B.
The names for your peers have been reversed.

C.
You have not issued the command “vpn write config’ command.

D.
You have not licensed your gateways for VTIs.