This configuration is found on the Cisco Unified Communications Manager Express router:
interface GigabitEthernet0/1
description Voice Network
ip address 172.31.12.1 255.255.255.0
interface Service-Engine1/0
description NM-CUE
ip unnumbered GigabitEthernet0/1
service-module ip address 172.31.12.254 255.255.255.0
service-module ip default-gateway 172.31.12.1
ip route 0.0.0.0 0.0.0.0 172.31.11.1
Which route is needed to complete this configuration?

A.
ip route 172.31.12.254 255.255.255.255 Service-Engine1/0

B.
ip route 172.31.12.254 255.255.255.255 172.31.12.1

C.
ip route 172.31.12.254 255.255.255.255 172.31.12.254

D.
ip route 172.31.12.254 255.255.255.255 172.31.11.1