正解:C
A spear phishing attack is a type of cyberattack that targets a specific individual or organization with a fraudulent email that appears to be from a trusted source, and attempts to trick the recipient into clicking amalicious link, opening a malicious attachment, or providing sensitive information. A spear phishing attack can compromise the security, confidentiality, integrity, or availability of the information systems and data of the individual or organization. The most effective way to mitigate the risk associated with spear phishing attacks is to implement a security awareness program, which is a program that educates and trains the employees and stakeholders of the organization about the security policies, procedures, and best practices, and the potential threats and risks that may affect the organization. A security awareness program can help to prevent or reduce the success of spear phishing attacks, as it can increase the knowledge and skills of the employees and stakeholders to recognize and avoid the fraudulent emails, and to report and respond to any suspicious or malicious activities. References = CRISC Review Manual, 7th Edition, page 181.