Understanding the Ransomware Issue: The key issue here is that backups were not recoverable within the required RPO timeframe. This means the organization did not properly test its backup and disaster recovery (DR) processes. To prevent this from happening again, regular disaster recovery testing is essential. Why Option C is Correct: Disaster recovery testing ensures that backups are functional and can meet business continuity needs. Frequent DR testing allows organizations to identify and fix gaps in recovery strategies. Regular testing ensures that recovery meets the RPO & RTO (Recovery Time Objective) requirements.