The correct answer is C — Implementation of secure user authentication protocols.

WGU Cybersecurity Architecture and Engineering (KFO1 / D488) emphasizes that secure authentication mechanisms, like strong passwords, multifactor authentication, and session management, prevent unauthorized access and impersonation, thus helping prevent cheating inlearning platforms.

Firewall policies (A) and disabling Bluetooth (B) harden systems but do not directly address authentication. Software updates (D) protect against system vulnerabilities but not user integrity.

Reference Extract from Study Guide:

"Secure authentication protocols ensure that users accessing learning management systems are properly verified, reducing risks of impersonation and cheating."

— WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Secure Access Control and Identity Verification

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