The correct answer is Amazon CloudFront. It is designed to use a global network of edge locations to cache and deliver content, such as videos, to end-users with minimized latency and high data transfer rates, which optimizes the viewing experience. AWS Direct Connect is used for establishing a dedicated network connection from premises to Amazon's network, which does not inherently optimize content delivery for end-users. Amazon Route 53 is a Domain Name System (DNS) web service, which primarily manages traffic through domain name resolution rather than content delivery. AWS Global Accelerator improves the availability and performance of applications by routing user traffic to the nearest endpoint, but it is not primarily a content delivery network.