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AWS Certified Solutions Architect - Associate · AWS
Select one answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
You need to read the question carefully. The solutions architect must minimize changes to the application code = therefore A If this question without this statement, B will be a better choice.
minimize ongoing operational overhead = Not B Using ElastiCache require app change
AWS Aurora and Native Functions are least application changes while providing better performance and minimum latency. https://aws.amazon.com/rds/aurora/faqs/ B, C, D require lots of changes to the application so relatively speaking A is least code change and least maintenance/operational overhead.