Answer: Amazon EC2

The correct answer is D, Amazon EC2. Amazon EC2, or Elastic Compute Cloud, is a service that provides scalable computing capacity in the AWS cloud. It allows users to choose from a wide range of instance types that offer different combinations of CPU, memory, storage, and networking capacity to match the specific needs of their applications. This makes EC2 the ideal choice for deploying applications that require a variety of configurations, as mentioned in the question. The other options are not suitable for this scenario: AWS Lambda is used for running code without managing servers, Amazon Cognito is for user authentication and access control, and Amazon Athena is an interactive query service that makes it easy to analyze data in Amazon S3 using standard SQL.

Author: LeetQuiz Editorial Team