The dot plot shows the number of chess games won by each of the 20 students in a competition.
Which statement about the data is true?
A. The median is 4, and the interquartile range is 10
B. The median is 4, and the interquartile range is 5
C. The median is 5, and the interquartile range is 10
D. The median is 5, and the interquartile range is 5
