A SysOps administrator manages a production workload that runs a steady baseline of EC2 instances 24/7. Over the next year the team plans to migrate some workloads from the m5 family to the newer m6i family and may also shift a portion of compute to AWS Fargate. Finance wants to commit to a discount that maximizes savings on the steady baseline while remaining flexible across instance families, sizes, Regions, and even Fargate. Which purchasing option best meets these requirements?