which statement is true about these 2 distributions? A. the mean of set A is less than the mean of set B, and their standard deviations are the same B. the mean set of a is greater thn the mean of set B, and their standard deviations are the same. C. the standard deviation of set A is less than the standard devation of set b, and their means are the same. D. the standard deviation of set a is greater than the standard deviation of set b, and their means are the same.