Determine whether the distribution is a discrete probability distribution. x âp(x) 0 0.21 1 0.28 2 0.02 3 0.28 4 0.21 is the distribution a discrete probabilityâ distribution? why? choose the correct answer below. a. no comma because the total probability is not equal to 1. b. no comma because some of the probabilities have values greater than 1 or less than 0. c. yes comma because the distribution is symmetric. d. yes comma because the probabilities sum to 1 and are all between 0 and 1 comma inclusive.