Which of the following is the primary function of a thermally-activated Pressure Relief Device (PRD) on a CNG cylinder?
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A
To regulate the flow of fuel to the engine.
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B
To prevent over-pressurization during normal fueling by venting excess pressure.
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C
To safely vent the cylinder's contents in the event of a fire or high-temperature exposure.
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D
To act as a manual shut-off valve in an emergency.