The correct answer is B, Amazon Lightsail. It is designed for users with limited operational knowledge and provides a simplified and user-friendly service for quickly launching and managing virtual private servers (VPS) with pre-configured options for compute, storage, and networking. Lightsail is particularly suitable for small websites and databases, as it offers an easy-to-use interface and simplifies the migration process. Amazon S3 (C) is primarily an object storage service and not designed to run databases. Amazon EC2 (A) offers more flexibility but requires deeper AWS knowledge for setup and management. AWS Lambda (D) is a serverless computing service and not intended for running websites or databases.