Which of the following is considered the MOST effective tool against social engineering?

An effective security awareness program is the most powerful tool against social engineering. Training employees to recognize and respond to threats like phishing and other manipulative tactics significantly reduces the risk of successful attacks. While anti-phishing and anti-malware tools (A, C) offer technical defenses, they cannot replace the importance of informed and vigilant employees. Security Vulnerability Management (D) addresses technical vulnerabilities but is less focused on human risk.