Which service configuration should a solutions architect recommend?

Explanations:

Deploying a NAT server in front of Amazon S3 is not relevant for improving response times or reducing latency and cost for static content. NAT servers are typically used for instances that need to access the internet while remaining private; they do not cache content or optimize delivery from S3.

Deploying Amazon CloudFront in front of Amazon S3 is the best solution for improving response times and reducing latency and cost. CloudFront is a content delivery network (CDN) that caches content at edge locations closer to users, thus speeding up access to static images and reducing S3 request costs by serving cached content.

Deploying a Network Load Balancer in front of Amazon S3 is unnecessary because S3 is a fully managed service that does not require load balancing for static content delivery. Load balancers are more suitable for distributing traffic among multiple instances or services, not for direct access to S3.

Configuring Auto Scaling is irrelevant for static content stored in S3, as Auto Scaling is designed for adjusting the number of EC2 instances based on demand. Since S3 is a serverless service, it does not need auto-scaling capabilities to handle static content requests.