The configuration shows that the VRRP (Virtual Router Redundancy Protocol) is set up on both FortiGate devices, with the virtual IP (vrip) set to 10.1.5.254, which indicates that this IP address is likely used as the default gateway for the internal network. This conclusion supports option C. Additionally, both devices have 'set vrrp-virtual-mac enable' configured, which means that on failover, the new primary device will use the same MAC address as the old primary to ensure seamless failover, supporting option B.