A is correct because:
DynamoDB global tablesallow for multi-Region, active-active usage.
RDS MySQL read replicain another Region supports read workloads and can bepromotedduring disaster to act as a standalone DB.
B is incorrect: DAX is a cache, not a replication mechanism.
C is wrong because Multi-AZ doesn’t span Regions.
D is more manual and error-prone.
[Reference:https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/GlobalTables.htmlhttps://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.html, , , , ]
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