A router connects networks A$,$ B$,$ and C$.$ A threat actor is successful in breaching the security protocols and breaks into network A$.$ From network A$,$ the threat actor spoofs the source IP address as if it is originating from network C and sends traffic to network B$.$ How can this condition be mitigated?

Group of answer choices

Enable port security on the router.

Use an ARP detection appliance.

Apply an inbound ACL on the router.

Enable layer $4$ firewall capabilities on the router.