Bill is a security analyst for his company. All the switches used in the company’s office are Cisco switches. Bill wants to make sure all switches are safe from ARP poisoning. How can Bill accomplish this?

A.
Bill can use the command: ip dhcp snooping.

B.
Bill can use the command: no ip snoop.

C.
Bill could use the command: ip arp no flood.

D.
He could use the command: ip arp no snoop.