Which of the following is considered a threat actor? a. A password b. An employee clicking a phishing link c. An antivirus program d. A firewall

b. An employee clicking a phishing link A threat actor refers to an individual or entity that poses a threat to an organization's security, typically by engaging in malicious activity. An employee clicking a phishing link can be considered a threat actor, as their action may open the door for potential security breaches. In contrast, a password, antivirus program, and firewall serve protective roles rather than acting as threats.