In order to enter a high-security datacenter, users are required to speak the password into a voice recognition system. Ann a member if the sales department over hears the password and upon speaks it into the system. The system denies her entry and alerts the security team. Which of the following is the MOST likely reason for her failure to enter the data center?
A. An authentication factor
B. Discretionary access
C. Time of day restrictions
D. Least privilege restrictions