A company needs guaranteed Amazon EC2 capacity in three specific Availability Zones in a specific AWS Region for a 1-week event. What should the company do to guarantee the EC2 capacity?

An On-Demand Capacity Reservation guarantees EC2 capacity for the specified duration, instance type, and Availability Zone(s). This is ideal for short-term, critical needs like a 1-week event, as it ensures resources are available when required. Purchasing Reserved Instances, whether regional or AZ-specific, commits to a longer-term (1-3 years) pricing discount, but does not guarantee capacity. While Convertible Reserved Instances offer flexibility, they still don't reserve capacity. Therefore, an On-Demand Capacity Reservation is the only option that guarantees the necessary capacity for the specified timeframe and locations.