Why would VRRP be implemented when configuring a new subnet in a multivendor environment?

Why would VRRP be implemented when configuring a new subnet in a multivendor environment?

A. when a gateway protocol is required that support more than two Cisco devices for redundancy B. to enable normal operations to continue after a member failure without requiring a change In a host ARP cache C. to ensure that the spanning-tree forwarding path to the gateway is loop-free D. to interoperate normally with all vendors and provide additional security features for Cisco devices