An engineer is servicing a flueless gas cabinet heater. What is the primary function of the Oxygen Depletion Sensor (ODS) fitted to this appliance?
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A
To shut off the gas supply if the carbon monoxide level in the room becomes too high.
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B
To shut off the gas supply if the flame is extinguished by a draught.
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C
To shut off the gas supply if the oxygen level in the room falls below a pre-set safe limit.
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D
To automatically increase the ventilation into the room when poor combustion is detected.