Which of the following types of malware would most likely be detected when observing unusually...

The correct answer is C. Cryptominer . Cryptominer malware secretly uses a victim computer’s processing resources to mine cryptocurrency for an attacker. Because cryptocurrency mining requires heavy computation, this malware commonly causes unusually high CPU or GPU usage. The All-in-One Exam Guide explains that cryptominers take control of a computer’s hardware resources to mine cryptocurrency and that a telltale sign may be inexplicably high GPU or CPU utilization. The Mike Meyers/Mark Soper material states the same concept: cryptominer malware uses the target system’s CPU or GPU, and one sign of infection is unexplained high resource usage. A keylogger records keystrokes, a Trojan disguises itself as legitimate software while performing malicious actions, and a rootkit hides itself using low-level OS access. Those malware types can be dangerous, but high CPU usage most strongly points to a cryptominer.