What is the recommended practice when considering VPN termination and firewall placement?

What is the recommended practice when considering VPN termination and firewall placement?

A.
have the firewall and VPN appliance deployed in parallel

B.
place the VPN in line with the firewall, with the VPN terminating inside the firewall

C.
place the public side of the VPN termination device in the DMZ behind a firewall

D.
place the VPN in line with the firewall, with the VPN terminating outside the firewall