What mechanism should you choose to prevent unicast flooding?

What mechanism should you choose to prevent unicast flooding?
A . Make sure that all end systems are connected to the network with a single physical connection.
B . Use control plane policing (CPP) to limit unicast flooding.
C . Configure the ARP cache timers to be longer than the switch forwarding cache (CAM) timers.
D . Configure the switch forwarding cache (CAM) timers to be longer than the ARP cache timers.

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Answer: D