The correct answers are C and E. Amazon RDS (Relational Database Service) is a fully managed relational database service that supports various database engines such as MySQL, PostgreSQL, Oracle, SQL Server, and Amazon Aurora. It automates time-consuming administration tasks such as patching, backups, and scaling. Amazon DynamoDB, on the other hand, is a fully managed NoSQL database service that offers fast and predictable performance with seamless scalability. It provides features like automatic scaling, built-in security, and automated backups, making it suitable for applications that require low-latency data access and flexible scaling. Options A, B, and D are related to storage services and not database services, hence they are not the correct answers.