The correct answer is D, DDoS protection. This is because DDoS (Distributed Denial of Service) attacks are specifically designed to overwhelm and exhaust application resources, affecting the application's availability to handle legitimate requests. Azure DDoS protection offers two service tiers: Basic and Standard. The Standard tier includes advanced features such as logging, alerting, and telemetry, which can generate detailed reports of attempted attacks, fulfilling the requirements of securing websites and generating attack reports.