Which of the following would be the BEST way to help ensure the effectiveness of a data loss prevention (DLP) control that has been implemented to prevent the loss of credit card data? 

Answer options:

A. Reviewing logs for unauthorized data transfers
B. Configuring the DLP control to block credit card numbers
C. Testing the transmission of credit card numbers
D. Testing the DLP rule change control process

A

Reference: https://www.esecurityplanet.com/network-security/data-loss-prevention-dlp.html