The SLA should include the Recovery Time Objective (RTO) to satisfy this requirement. The RTO is the maximum acceptable time that an application or service can be unavailable after a disaster or disruption. It defines the target duration for restoring the functionality and performance of the application or service. The RTO is usually measured in hours or days, depending on the criticality of the application or service. In this case, the requirement states that the application must be restored within six hours, which means that the RTO should be six hours or less. The other options are not relevant to this requirement. The Mean Time to Repair (MTTR) is the average time that it takes to fix a faulty component or system. The Recovery Point Objective (RPO) is the maximum acceptable amount of data loss that can occur after a disaster or disruption. It defines the point in time to which the data must be restored. The RPO is usually measured in minutes or hours, depending on the frequency of data backups. The Return on Investment (ROI) is the ratio of the net profit to the initial cost of an investment. It measures the financial benefit of an investment over time. Reference: CompTIA Cloud Essentials+ Certification Study Guide, Second Edition (Exam CLO-002), Chapter 3: Business Principles of Cloud Environments, Section 3.2: Cloud Assessments, p. 103-104.