Which of these following sensor is a useful as part of a burglar alarm system for commercial buildings ?

Correct answer: D. All of the mentioned

  • A. Movement detector
  • B. Door sensor
  • C. Window sensor
  • D. All of the mentioned

Explanation

A commercial burglar alarm may combine movement detectors with door and window sensors to detect different forms of intrusion. Therefore, all three sensor types can be useful.

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