A megger is being used to test the insulation of an AC generator. The resistance value of a dry, clean winding will _____________. A. continue to rise as test potential is maintained, becoming fairly steady as the dielectric-absorption effect of insulation stabilizes B. remain constant as the temperature of the windings increases C. continue to drop as test potential is maintained, becoming fairly steady after 5-7 minutes D. stabilize after approximately 2-4 minutes of fluctuation