The correct answers are A and D. AWS Fargate is a serverless compute engine for containers, which means you can run containers without managing servers or clusters. It automatically provisions and manages the infrastructure based on the application's needs. Amazon S3, on the other hand, is a serverless object storage service. It allows you to store and retrieve data at any scale, and you only pay for the storage you use without the need to manage any servers. Options B and C are not serverless as they require some level of management of the underlying infrastructure. Amazon EMR, for example, is a managed service but still requires the user to manage the infrastructure to some extent.