What should the solutions architect use to meet these requirements?

Explanations:

Amazon CloudFront is a content delivery network (CDN) that caches content at edge locations to improve delivery speed. However, it is not specifically designed to provide accelerated TCP connections for live streaming via RTMP. It works well for HTTP(S) traffic but not for real-time media streams.

AWS Global Accelerator provides optimized routes to AWS services through the global network of AWS edge locations. It accelerates TCP and UDP traffic, which is essential for real-time applications like live streaming. It reduces latency and improves the performance of live broadcasts, making it suitable for reporters sending high-quality streams.

AWS Client VPN is a managed client-based VPN service that enables users to securely access AWS resources and on-premises networks. While it provides secure connections, it is not designed for accelerating streaming or media traffic. It does not focus on improving TCP connections for real-time media.

Amazon EC2 instances and AWS Elastic IP addresses can be used to host a broadcasting system, but they do not inherently provide accelerated TCP connections. While you could use EC2 instances to run the streaming software, they would not optimize the route or speed of the data transfer like Global Accelerator would.