While conducting research on malicious domains, a threat intelligence analyst received a blue screen of death. The analyst rebooted and received a message stating that the computer had been locked and could only be opened by following the instructions on the screen. Which of the following combinations describes the MOST likely threat and the PRIMARY mitigation for the threat?
A. Ransomware and update antivirus
B. Account takeover and data backups
C. Ransomware and full disk encryption
D. Ransomware and data backups