The correct answer is Amazon CloudFront, as it is a global content delivery network (CDN) designed to distribute content to users with high availability and low latency, by serving content from locations nearest to the users (edge locations). AWS VPN is mainly used for securely connecting on-premises networks to AWS infrastructure, which isn't the right fit for global content delivery. An Elastic Load Balancer is used to distribute incoming application traffic across multiple targets, such as EC2 instances, but doesn't inherently reduce latency for global users. Likewise, selecting an Availability Zone is about picking a location for deploying resources to ensure high availability and is not primarily concerned with content caching and delivery.