The sun has a lifetime of approximately 10 billion years. if you could determine the rate of nuclear fusion for a star with twice the mass of the sun, which of the following would best describe how its fusion rate would compare to the sun? choose the best possible response to complete the sentence given below. a star with twice the mass of the sun would have a rate of nuclear fusion that is the rate of fusion in the sun. a) less than b) a little more than c) twice d) more than twice explain your reasoning for the choice you made.