Suggest the importance of utilizing Route Process Redundancy (RPR), Stateful Switch Over (SSO), and Non Stop Forwarding (NSF) in the implementation of Redundant Supervisor Engines in Catalyst switches. Indicate the manner in which you would choose one (1) option over another in terms of fail-over time, transparency, and configuration complexity. Describe the way in which redundant gateways are configured for first-hop protocols such as Hot Standby Router Protocol (HSRP), Virtual Router Redundancy Protocol (VRRP), and Gateway Load Balancing Protocol (GLBP) to ensure that they operate in a way that provides redundancy and load balancing.