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