To which AWS service could the company migrate the database?

Explanations:

Amazon Athena is a serverless query service that allows for querying data stored in Amazon S3 using SQL. It is not a database service and cannot be used to host an Oracle database.

Amazon DynamoDB is a NoSQL database service that is not compatible with Oracle’s relational database structure. It would require significant changes to the application, which is not an option in this scenario.

Amazon RDS (Relational Database Service) supports Oracle databases and allows for easy migration of Oracle databases to AWS without needing to rewrite the application. It provides managed database services that facilitate scalability and maintenance.

Amazon DocumentDB is a document database service that is compatible with MongoDB. It is not designed to run relational databases like Oracle, making it unsuitable for migrating an Oracle database without rewriting the application.