The dot plots represent the Intelligence Quotients, or IQs, for fourth grade students in two different classes. Which of the statements are true?

I. The means of the classes differ by less than one point.
II. Class 2 has a greater median compared to class 1.
III. Class 1 has a greater interquartile range compared to class 2.
IV. Class 2 has a greater standard deviation than class 1.
A.
I and II
B.
II and III
C.
I and IV
D.
II and IV