An e-commerce company has recently experienced a series of phishing attacks targeting its employees. The company tasks the security team with implementing a solution to prevent email spoofing and protect against future phishing attempts. Which of the following technologies would be the most effective at achieving this goal? 

A. Two-factor authentication 

B. DNS-based Authentication of Named Entities (DANE) 

 

C. Sender Policy Framework (SPF) 

D. Public key infrastructure (PKI)