Which of the following statements about the different types of malware is MOST ACCURATE?

The correct answer is C. A Trojan horse is malware that appears to be legitimate, useful, or harmless software but contains hidden malicious code. Once installed or executed, it can damage systems, steal information, create unauthorized access, or perform other harmful actions. Option A describes ransomware, not a worm; ransomware restricts access to systems or files and demands payment. A worm is self-replicating malware that spreads across networks. Option B describes adware more closely than spyware. Spyware secretly monitors and reports user activity or information. Option D also describes spyware rather than ransomware. Professionally, the key distinction is the malware’s function: concealment and deception for Trojan horses, self-replication for worms, surveillance for spyware, and restriction or encryption for ransomware.

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