This distribution has a mean of 10 and an ADM of 4. Which additions to the data set will keep the mean at 10 but increase the ADM? (You should be able to do this without calculating anything, but calculate if you need to.) a) Adding 16 and 18 to the distribution. (Check "a" below) b) Adding 4 and 16 to the distribution. (Check "b" below) c) Adding 9 and 11 to the distribution. (Check "c" below) d) Adding 6 and 14 to the distribution. (Check "d" below) Group of answer choices a) Adding 16 and 18 to the distribution. b) Adding 4 and 16 to the distribution. c) Adding 9 and 11 to the distribution. d) Adding 6 and 14 to the distribution.