A company has a compute workload that is steady, predictable, and must not be interrupted. Which Amazon EC2 purchasing options are the MOST cost-effective choices? (Choose two.)

Reserved Instances (RIs) and Savings Plans are the most cost-effective options for steady, predictable, and uninterrupted workloads. RIs offer significant discounts (up to 75%) compared to On-Demand pricing in exchange for committing to a specific instance type and region for a 1- or 3-year term. Savings Plans offer similar discounts but provide more flexibility by applying to compute usage across EC2, Fargate, and Lambda, regardless of instance family, size, OS, or region, in exchange for a consistent hourly spend commitment. On-Demand Instances are flexible but more expensive, suitable for short-term, irregular workloads. Spot Instances are the cheapest but can be interrupted with two minutes' notice, making them unsuitable for uninterrupted workloads. Dedicated Hosts provide physical server isolation but are generally more expensive and used for specific licensing or compliance requirements, not primarily cost optimization for a steady workload.