During start-up of the circuit shown in the illustration, it is noted that the ends of component 'C' alternately glow and become dark without the tube illuminating. The most probable cause for this is that ____________. EL-0081 A. component 'D' is loose and due to the ship's vibrations makes and breaks contact B. the power system's voltage is fluctuating in and out of the range necessary for proper operation C. component 'A' is shorted and therefore unable to produce the high voltage required to start the lamp D. component 'B' contacts are opening and closing thus prohibiting sufficient current flow