When Checking the Operation of a Rear-Window Defogger with a Voltmeter

When checking the operation of a rear-window defogger with a voltmeter ________.

A) The voltmeter should indicate decreasing voltage when grid is tested across width of glass
B) The voltmeter should be set to read AC volts
C) Voltage should be available anytime at the power side of the grid because the control circuit just completes the ground side of the heater grid circuit
D) The voltmeter should read close to battery voltage anywhere along the grid

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