The dot plots represent the cost of first-year college tuitions for two different U.S. regions. Which of the statements are true?

I. Region 1 has a greater mean than region 2.
II. Region 2 has a greater median than region 1.
III. Region 1 has a greater interquartile range than region 2.
IV. Region 2 has a greater standard deviation than region 1.
A.
I and II
B.
III and IV
C.
II and IV
D.
I and III