Correct Answer: DGiven the problem description, the web application farm is limited in processing requests beyond 5,000 concurrent connections. The configuration of the hardware seems adequate with 16vCPU, 128GB of memory, and 512GB of local storage, suggesting that the issue is likely not with the hardware resources themselves but with how the application is configured to utilize these resources. Reviewing the application configuration can help identify limitations or misconfigurations within the application that could be causing this bottleneck, such as maximum connections settings, thread pool sizes, or other performance-related parameters. This is a more specific and targeted action compared to the other options.