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Which method is recommended for encrypting EBS volumes and snapshots used to store sensitive data?
①Implement custom encryption at the OS layer and do not use KMS.
②Protect with access control only, without encryption.
③Enable EBS encryption using an AWS KMS customer-managed key (CMK)
④Store the encryption key in a file on the instance and use it.
⑤Download the snapshot to S3 and encrypt it manually.