正解:C
The central goal of DLP is to prevent sensitive data-such as PII, PHI, or intellectual property-from leaving the organization through unauthorized channels. DLP solutions monitor, detect, and block potential data exfiltration via email, endpoints, cloud applications, or removable media. While compliance (D) is often a driver, it is a secondary outcome of implementing DLP. Enhancing performance (A) and recovery automation (B) are not objectives of DLP. ISACA positions DLP as a critical control for confidentiality under DSS05 (Managed Security Services).
References (ISACA): COBIT 2019, DSS05 Managed Security Services.