Which of the following would be used to detect an employee who is emailing a customer list to a personal account before leaving the company?

File Integrity Monitoring (FIM) focuses on tracking changes to files and directories to detect unauthorized alterations or access. While FIM can alert on changes to files, it does not monitor data in transit or assess the context of data transfers, making it ineffective for detecting email transmissions of sensitive information.

Intrusion Detection Systems (IDS) are employed to monitor network traffic for suspicious activity or policy violations. However, they do not specifically target data loss scenarios and may not effectively identify the content of emails or their attachments, thus falling short in detecting unauthorized data transfers like emailing a customer list.

Endpoint Detection and Response (EDR) solutions focus on detecting and responding to threats on endpoints, such as malware or unauthorized access. While EDR can provide insights into endpoint activity, it does not specialize in monitoring and controlling sensitive data transmission, which is essential for detecting email-related data breaches.