A small computing center has found that the number of jobs submitted per day to its computers has a distribution that is approximately bell shaped with a mean of 71 jobs and a standard deviation of 8 Where would one expect most approximately the middle 95 of the distribution to fall O A between 55 and 95 jobs per day B between 55 and 87 jobs per day C between 47 and 95 jobs per day D between 63 and 79 jobs per day