(539)A company is receiving emails with links to phishing sites that look very similar to the company's own website address and content. following is the BEST way for the company to mitigate this attack?

A、Create a honeynet to trap attackers who access the VPN with credentials obtained by phishing.
B、Generate a list of domains similar to the company's own and implement a DNS sinkhole for each.
C、Disable POP and IMAP on all Internet-facing email servers and implement SMTPS.
D、Use an automated tool to flood the phishing websites with fake usernames and passwords.