When reading electrical motor controller diagrams, it helps to know that ____________. A. current paths in the control circuit are drawn as heavy lines and in the power circuit as lighter lines B. current paths in the power circuit are drawn as heavy lines and in control circuit as lighter lines C. circuits subject to 500 volts or greater are drawn as heavy lines and below 500 volts as lighter lines D. circuits subject to 500 volts or greater are drawn as light lines and below 500 volts as heavy lines