DynamoDB global tables provide a fully managed, multi-Region, multi-active database capability. Global tables automatically replicate DynamoDB table data across the AWS Regions selected by the customer. Applications can perform local reads and writes against replica tables, and DynamoDB propagates changes to the other replicas without requiring the customer to build a separate cross-Region replication system. Therefore, option A is correct. DynamoDB Accelerator is an in-memory cache designed to reduce DynamoDB response times for read-intensive workloads. It does not synchronize complete tables across Regions. A global secondary index provides an alternative partition key and optional sort key for querying data within a DynamoDB table; despite the word “global,” it is not a cross-Region replication feature. A service-linked IAM role allows DynamoDB to perform specified actions on behalf of a customer but does not independently replicate table data. Global tables are designed for globally distributed applications, business continuity, high availability, and low-latency access by users in different geographic locations. The direct exam association is DynamoDB global tables for automatic multi-Region table synchronization and replication.