A company has a predictable baseline of eligible compute spending for the next three years. It expects to move some workloads between EC2 instance families, Regions, and Fargate. It wants a commitment discount with flexibility across those choices. Which purchasing option best matches this requirement?

1. A Compute Savings Plan sized to the confidently predictable hourly spending baseline.
2. A dedicated On-Demand Capacity Reservation with no Savings Plan or Reserved Instance commitment.
3. A Standard EC2 Reserved Instance tied to the current instance configuration as the only discount mechanism.
4. An EC2 Instance Savings Plan restricted to the current instance family and Region.