A healthcare organization is required to comply with the Health Insurance Portability and Accountability Act...

The correct answer is C — Encryption.

WGU Cybersecurity Architecture and Engineering (KFO1 / D488) clearly states that encryption protects the confidentiality of transmitted information. In the case of SNMP (especially older versions like SNMPv1 and SNMPv2), communications are unencrypted, making encryption critical to protecting network management information from unauthorized disclosure.

Access controls (A) restrict who can access systems but do not encrypt data. Network segmentation (B) separates systems but does not encrypt traffic. Security monitoring (D) detects threats but does not protect data confidentiality.

Reference Extract from Study Guide:

"Encryption safeguards sensitive data transmitted over the network, ensuring confidentiality in compliance with privacy regulations such as HIPAA."

— WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Network Security and Data Protection