"Network Load Balancer is optimized to handle sudden and volatile traffic patterns while using a single static IP address per Availability Zone." https://aws.amazon.com/elasticloadbalancing/network-load-balancer/

For an application that must scale to millions of requests per second and requires a single static IP address for each Availability Zone, a Network Load Balancer (NLB) is the most suitable option. NLBs are designed for high-performance, low-latency networking, and they support static IP addresses for each Availability Zone, making it ideal for volatile traffic patterns. Option D is the correct choice. AWS provides extensive documentation on NLB capabilities and configurations that suit these requirements AWS Network Load Balancer.