A research organization is developing a web application hosted on Amazon EC2 instances across multiple Availability Zones. The application needs to serve users access to a large digital archive of approximately 800 TB of text-based documents. The company expects traffic to spike during certain events, such as annual academic conferences, and needs to ensure that storage can scale to meet demand without affecting performance. At the same time, the organization is highly cost-conscious and wants the most economical storage option that meets the application's needs for availability and scale.Which storage solution is the most suitable and cost-effective choice?