Due to its construction, the component in figure 'A' shown in the illustration has which of the listed advantages compared to bipolar devices? EL-0078 A. Operates with higher voltages and currents allowing its use in high power amplifiers. B. Its stable triggering voltage makes it useful in oscillators and timing circuits. C. Makes use of inherent unidirectional qualities serving as a controllable rectifier. D. Has very high input resistance and uses practically no gate current.