Which of the following accurately describes semiconductor diodes? A. Unlike junction diodes, point-contact diodes are enclosed in a suitable casing and have terminals for connecting them to a circuit. B. Unlike point-contact diodes, junction diodes utilize a point of metal wire in contact with a single wafer of P-type or N-type material. C. Junction diodes are preferred over point-contact diodes for most purposes. D. Point-contact diodes are more likely to be used as rectifiers than junction diodes.