Technician A says backup sensors use LEDs to detect objects. Technician B says that a backup sensor won't work correctly if the paint is thicker than 0.002 inch. Which technician is correct

Technician B

Explanation:

As in the question,  it is mentioned that according to the Technician A the backup sensors used LED for tracking the objects and as per the technician B the backup sensor does not work correctly unless the paint is thicker than 0.002 inch

Therefore according to the above explanation, the technician B is correct as it provides the valid reason

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