Moisture accumulating in electric motors and generator windings having a cold insulation resistance greater than 50,000 ohms may be baked out with internal heat. This heat can be developed by ____________. A. feeding current into the windings at low voltage B. short circuiting the armature and field windings C. short circuiting the field windings and passing current through the armature D. obtaining current from a DC source such as an electric welder and feeding it into the armature while running the motor at full speed