The sequence of operation for an oil burner is ________
A) the thermostat calls for heat, the ignition spark is established, the furnace fan comes on, the main flame is established
B) the thermostat calls for heat, the furnace fan comes on, the ignition spark is established, the main flame is established
C) the thermostat calls for heat, the ignition spark is established, the main flame is established, the furnace fan comes on
C
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