Which one of the following statements BEST explains what is meant by the “dual nature” of the electron? A : An electron may be either in a quasi-free state as in a metal or in a tightly-bound state deep within an atom. B : An electron plays a role in the production of both magnetic and electric fields. C : An electron can be transmitted in a beam as in a television or through a wire. D : An electron may act with either particle-like or wave-like characteristics. E : An electron can travel at very small velocities or be at rest. It’s motion adequately described by Newton’s laws of motion. The electron can also travel at speeds close to the speed of light; and its motion is described by relativistic laws of motion.