Malware adapts behavior, changes code dynamically, and exfiltrates data stealthily.

CEH v13 identifies AI-powered malware as an emerging advanced threat that adapts its execution based on environmental cues and user behavior. Unlike traditional polymorphic malware, AI-driven malware can dynamically decide when and how to execute actions to avoid detection.

The described traits—behavioral adaptation, idle-time exfiltration, encrypted communication—are hallmarks of AI-assisted malware.

Polymorphic viruses change signatures but do not adapt behavior intelligently. Rootkits focus on hiding presence. Worms propagate aggressively.

Therefore, Option A is correct.