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If a cipher lock has a door delay option, what does that mean?
It has a hostage alarm capability.
After a door is open for a specific period, the alarm goes on.
It has supervisory override capability.
It can only be opened for a specific period.
A security guard would want to be alerted when a door has been open for an extended period. A security system can have a threshold set so that if the door is open for the defined time period, an alarm sounds. EDIT: as per last option which is correct one, alarm goes off. However as per explanation, alarm sounds. which is contradictory.
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