A company receives an email threat informing of an Imminent Distributed Denial of Service (DDoS) attack targeting its web application, unless ransom is paid. Which of the following techniques BEST addresses that threat?

A. Deploying load balancers to distribute inbound traffic across multiple data centers
B. Set Up Web Application Firewalls (WAFs) to filter out malicious traffic
C. Implementing reverse web-proxies to validate each new inbound connection
D. Coordinate with and utilize capabilities within Internet Service Provider (ISP)