A company wants to reduce its Amazon EC2 costs while maintaining flexibility in instance usage. Which feature of Reserved Instances allows the company to apply reservations to instances that match the attributes of the reservation such as instance type and region, without being locked into specific instance IDs?
Modifying the Reserved Instance to a different instance family
Changing the Reserved Instance offering class from Standard to Convertible
Reserved Instance flexibility for instance attributes
Converting the Reserved Instance to an On-Demand Instance