You are responsible for increasing the security within the Company LAN. Of the following choices listed below， which is true regarding layer 2 security and mitigation techniques？ （）
- A Enable root guard to mitigate ARP address spoofing attacks.
- B Configure DHCP spoofing to mitigate ARP address spoofing attacks.
- C Configure PVLANs to mitigate MAC address flooding attacks.
- D Enable root guard to mitigate DHCP spoofing attacks.
- E Configure dynamic APR inspection （DAI） to mitigate IP address spoofing on DHCP untrusted ports.
- F Configure port security to mitigate MAC address flooding
- G None of the other alternatives apply