Recovery the objectives (RTOs) should be based on

Recovery time objectives (RTOs) are the acceptable timeframes within which business processes must be restored after a disruption. RTOs should be based on the maximum tolerable downtime (MTD), which is the longest time that a business process can be inoperable without causing irreparable harm to the organization. The other options are not directly related to RTOs, as they refer to the amount of data loss or corruption that can be tolerated, not the time to restore the business processes. References = Risk and Information Systems Control Study Manual, Chapter 4: Risk and Control Monitoring and Reporting, Section 4.3: Key Risk Indicators, page 197.