The correct answer is D. The Anti-Bot blade is primarily associated with post-infection detection and prevention of bot communication. It identifies infected hosts attempting to communicate with command-and-control servers or malicious destinations and blocks that communication according to policy. Option A describes exploit-prevention behavior more closely aligned with IPS or Threat Emulation-style protections, not specifically Anti-Bot. Option B is wrong because Anti-Bot is not mainly pre-infection detection; it detects signs that a host may already be infected and communicating externally. Option C is too broad and describes general Threat Prevention, not the specific Anti-Bot blade. Anti-Bot is valuable because endpoint compromise may occur despite preventive controls. Detecting botnet communication lets the gateway disrupt attacker control channels and identify infected internal assets for remediation. Reference topics: Threat Prevention, Anti-Bot blade, command-and-control detection, post-infection detection.