SAT One-variable data Question

Data set A: 8, 11, 12, 15, 21, 27 Data set B: 9, 12, 13, 16, 22, $h$ Data sets A and B each consist of 6 values as shown, where $h$ is a constant. If the standard deviation of data set A is greater than the standard deviation of data set B, which of the following could be the value of $h$? I. 23 II. 28 III. 29