Which of the following has MOST likely occurred?

A security guard observes an individual entering the building after scanning a badge. The facility has a strict badge-in and badge-out requirement with a turnstile. The security guard then audits the badge system and finds two log entries for the badge in question within the last 30 minutes.

Which of the following has MOST likely occurred?
A . The badge was cloned.
B . The physical access control server is malfunctioning.
C . The system reached the crossover error rate.
D . The employee lost the badge.

Answer: A