Which of the Following Best Describes a Transistor

Multiple Choice

Which of the following best describes a transistor?

A) a cable that transmits bits by means of light pulses along a glass or plastic fiber instead of electrical signals over a conductor
B) an electronic device that can accept, manipulate, store, and output data, and whose instructions can be programmed
C) an older information system that remains in use because it still functions and is costly to replace
D) a small electrical circuit made from a semiconductor material such as silicon