In order to enter a high-security data center, users are required to speak the correct password into a voice recognition system. Ann, a member of the sales department, overhears the password and later 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