Which solution will meet these requirements MOST cost-effectively?

Explanations:

The Aurora Standard storage configuration does not specifically optimize for performance under high load, which may lead to suboptimal performance as traffic increases. It is generally suitable for typical workloads but may not be the most cost-effective solution for applications expecting high traffic.

Provisioned IOPS offers high-performance storage with guaranteed input/output operations per second (IOPS), but it is typically more expensive than necessary for many workloads. This option would be cost-ineffective if the application does not require the sustained high performance that Provisioned IOPS provides.

General Purpose storage provides a balance of price and performance but may not optimize for the peak performance requirements under high load scenarios. It is suitable for various workloads but could lead to performance bottlenecks as traffic increases.

The Aurora I/O-Optimized storage configuration is designed to enhance performance for workloads that require high throughput and low latency. This option is tailored to handle increased traffic cost-effectively, making it the best choice for optimizing storage performance in a highly demanding environment.