A Cisco Security MARS appliance cannot access certain devices through the default gateway. Troubleshooting has determined that this is a Cisco Security MARS configuration issue. Which additional Cisco Security MARS configuration will be required to correct this issue?

A.
use the Cisco Security MARS GUI or CLI to enable a dynamic routing protocol

B.
use the Cisco Security MARS CLI to add a static route

C.
use the Cisco Security MARS GUI to configure multiple default gateways

D.
use the Cisco Security MARS GUI or CLI to configure multiple default gateways