A company must store data from a healthcare application whose data changes frequently. A new regulation requires audit access at all levels of stored data. The application is on-premises and running out of storage. A solutions architect must securely migrate the existing data to AWS while satisfying the regulation. Which solution meets these requirements?

The correct solution uses AWS DataSync for efficient, secure migration of frequently changing on-premises data to Amazon S3. DataSync is optimized for large-scale data transfers over the internet or AWS Direct Connect. AWS CloudTrail with data events enabled provides the necessary audit access at all levels of stored data in S3, fulfilling the regulatory requirement. AWS Snowcone is for offline data transfer, not suitable for frequently changing data. While CloudTrail logs management events by default, logging data events is crucial for auditing access to the stored data itself. Amazon S3 Transfer Acceleration speeds up uploads to S3 but doesn't manage the transfer of existing on-premises data like DataSync. AWS Storage Gateway connects on-premises applications to cloud storage but is less ideal for a one-time, large-scale migration of existing data compared to DataSync, and again, CloudTrail needs data events enabled for the audit requirement.