What must you enable to see the Directional Match?

You are trying to configure Directional VPN Rule Match in the Rule Base. But the Match column
does not have the option to see the Directional Match. You see the following window. What must
you enable to see the Directional Match?
Exhibit:

A.
directional_match(true) in the objects_5_0.C file on Security Management Server

B.
VPN Directional Match on the Gateway object’s VPN tab

C.
VPN Directional Match on the VPN advanced window, in Global Properties

D.
Advanced Routing on each Security Gateway