A is correct According to the AWS shared responsibility model, when using Amazon RDS to host a database, the customer is responsible for managing connections to the database. The other options listed are the responsibility of AWS. Specifically, Amazon RDS manages the underlying infrastructure of the database, including hardware, networking, and database software updates. However, customers are responsible for managing the configuration and security of their own database instances, including managing access to the database and ensuring data is encrypted in transit to and from the database. Therefore, options B, C, and D are responsibilities of AWS, while option A (manage connections to the database) is a customer responsibility.
