Use the box-and-whisker plot to answer the question. +
0
+
6
3
9
12
15
18
21
Which statement best describes the data set represented by this box-and-whisker plot?
A. Half of the data is less than 3. and half of the data is greater than 3.
B. Half of the data is less than 6, and half of the data is greater than 6.
C. Half of the data is less than 9, and half of the data is greater than 9.
D. Half of the data is less than 12, and half of the data is galater than 12.
E. Half of the data is less than 15, and half of the data is greater than 15.