MAT 106Business and Finance Basics III and Statistics Question15of20:Select the best answer for the question.15. Assume the mean useful life of a particular light bulb is 2,000 hours, which is normally distributed with a standard deviation of 300 hours. What is the range of the useful life of light bulbs within two standard deviations of the mean?A.Longer than 1,700 hoursB.Between 1,400 and 2,600 hoursC.Longer than 2,300 hoursD.Between 1,700 and 2,300 hours