Which statement correctly describes Layer 3 roaming?

Layer 3 roaming allows a wireless client to move between access points (APs) that are on different IP subnets (Layer 3 networks) without obtaining a new IP address. This is achieved by anchoring the client's session to its original mobility anchor controller, which then tunnels traffic to the AP in the new subnet. This process ensures seamless connectivity for the client. The key requirement is that all involved controllers must be part of the same mobility group to facilitate the tunneling and anchor controller functionality. Option A is incorrect because Layer 3 roaming requires APs to be in the same mobility group for seamless transitions. Option B is incorrect; while SSO is a feature, it's not a prerequisite for Layer 3 roaming. Option C is incorrect because the primary benefit of Layer 3 roaming is that clients do not need to obtain a new IP address, maintaining their current session.