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I also doubt the correctness of adding Global Accelerator. For example, we have not considered cost and how it compares with cost for transfer acceleration as the solution with transfer acceleration is technically correct but discarded as it is more expensive.
S3 CRR is a good solution but asynchronous replication meaning the user experience may not be guaranteed. Is that acceptable? If not, this option should not be considered and one should redirect all the users to the same S3 bucket via transfer acceleration / global accelerator.
Hence, the correct options really depend on additional factors that are not given in the question. The options shown as correct are correct in a specific scenario and not generally correct.
Thanks.
