Which statement best explains the temperature dependence

Chapter 42, Problem 42.57

(choose chapter or problem)

Which statement best explains the temperature dependence of the currentvoltage characteristics that the graph shows? At higher temperatures: (a) The band gap is larger, so the electron hole pairs have more energy, which causes the current at a given voltage to be larger. (b) More electrons can move to the conduction band, which causes the current at a given voltage to be larger. (c) All of the electrons in the valence band move to the conduction band, and the diode behaves like a metal and follows Ohms law. (d) The acceptor and donor impurity atoms are free to move through the material, which causes the current at a given voltage to be larger

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