A single resistor is connected across the terminals of a battery. Which one or more of the following changes in voltage and current leaves unchanged the electric power dissipated in the resistor? Explain .A) Doubling the voltage and reducing the current by a factor of two. B) Doubling the voltage and increasing the resistance by a factor of four. C) Doubling the current and reducing the resistance by a factor of four. a) A, B,C will leave the power unchanged b) A, B will leave the power unchangedc) B, C will leave the power unchangedd) only A will leave the power unchanged e) only B will leave the power unchanged