Data spillage occurred when an employee accidentally emailed a sensitive file to an external recipient. Which of the following controls would have MOST likely prevented this incident? 

Answer options:

A. SSO
B. DLP
C. WAF
D. VDI

B

Reference: https://greenlightcorp.com/blog/cyber-security-solutions-data-spillage-and-how-to-create-an-after-incident-to-do-list/