Answer:
C
Step-by-step explanation:
The data points go from 16 to 28 so the ends need to bet there
The median is the middle line in the box
There are 12 data points, so the middle is between the 6th and 7th point
(21+23)/2 = 22
A has a median at 21 and B has a median at 23
C has a median at 22