What should a solutions architect recommend to meet this requirement?

Explanations:

Amazon ElastiCache for Redis can provide caching capabilities to reduce latency for read-heavy applications, but it would require additional operational management and configuration for integration with the existing DynamoDB setup, which contradicts the requirement of minimizing operational overhead.

Amazon DynamoDB Accelerator (DAX) is a fully managed, in-memory caching service specifically designed for DynamoDB. It can significantly improve the read performance of applications without requiring changes to the application code. DAX seamlessly integrates with DynamoDB and provides fast response times for read operations, addressing the performance issues directly.

DynamoDB global tables provide multi-region replication and high availability, but they do not inherently address performance issues for read operations. Implementing global tables would involve additional complexity and operational overhead, which is not ideal given the company’s requirement for minimal operational impact.

Amazon ElastiCache for Memcached can also improve performance by providing caching for read-heavy workloads, but similar to option A, it introduces additional operational complexity and management overhead that the company is trying to avoid. Integration with the current DynamoDB setup would require more configuration and maintenance.