Which solution will meet these requirements?

Explanations:

Amazon Cognito provides scalable authentication with low latency and integrates seamlessly with serverless architectures. Lambda@Edge allows for serverless authorization at the CloudFront edge locations, ensuring global performance. CloudFront serves the web application globally, meeting the requirement for low login latency and scalability for increasing user base.

AWS Directory Service for Microsoft Active Directory is more complex and not as suitable for a serverless architecture. While it offers authentication, it doesn’t provide low-latency login like Amazon Cognito. An Application Load Balancer does not serve content globally in the same manner as CloudFront.

While Amazon Cognito is suitable for authentication, using AWS Lambda for authorization does not provide the edge computing benefits that Lambda@Edge offers. S3 Transfer Acceleration is not a solution for serving web applications; it’s focused on improving transfer speeds to S3 buckets, not for global content delivery.

Similar to Option B, AWS Directory Service for Microsoft Active Directory is complex and not ideal for a serverless approach. While Lambda@Edge is a good choice for authorization, AWS Elastic Beanstalk is not designed for global content delivery and scalability as effectively as CloudFront.