The correct answer is C - Data loss prevention (DLP).
According to WGU Cybersecurity Architecture and Engineering (KFO1 / D488), DLP technologies monitor and control the transfer of sensitive information outside of the corporate network, preventing unauthorized data exfiltration whether by internal misuse or external threats.
MFA (A) strengthens authentication but does not monitor data transfer. IDS (B) detects intrusions but does not prevent data loss. IPS (D) blocks network attacks but is not specifically designed for preventing exfiltration of sensitive data.
Reference Extract from Study Guide:
"Data loss prevention (DLP) solutions protect sensitive data by monitoring, detecting, and blocking potential data exfiltration attempts."
- WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Data Protection Technologies