A safety measure that permits authorized personnel to identify themselves before emergency responders are notified is called:

• A. A wireless alarm system.
• B. A verified alarm system.
• C. A security survey.
• D. A residential sales agreement.

Answer: (B)

The idea being tested is a verified alarm system. In this setup, when an alarm is triggered, the monitoring center doesn’t automatically call emergency responders right away. Instead, they first verify the alarm, often by contacting the site and using two-way communication to confirm who is on the premises. Authorized personnel can identify themselves or provide credentials to confirm the situation, and only then are responders notified if the threat is real. This approach helps prevent false alarms and ensures that emergency resources are dispatched only after proper verification.

That’s why this choice fits best. The other options describe different concepts—how signals are transmitted (wireless), an assessment of security (security survey), or a non-related document (residential sales agreement)—and don’t capture the idea of confirming authorization before alerting responders.