Which of the following statements about authentication codes is true?

• A. They are used to ensure alarm monitors are authorized and not under duress
• B. They replace identification codes
• C. They are only used on safes
• D. They are not required for alarm monitoring

Answer: (A)

Authentication codes verify who is operating the system and that they have authorization to perform actions. They also often include a duress feature, allowing the operator to signal distress discreetly if they’re being coerced. This combination protects the alarm monitoring process from unauthorized access and from potential coercion, which is why this statement is true. The other options don’t fit: authentication codes don’t replace identification codes; they’re used across alarm systems, not just safes; and they are typically required for proper alarm monitoring.