Three teachers at Fairbanks Middle School surveyed their students at random to determine the number of siblings each student has. The results of the survey are shown in the dot plots below.

Which of the following statements is true based on the data presented in the dot plots?
A The mode for all three classes was the same number of siblings.
B Mr. Barrett’s class was the only class with an outlier.
C The spread of the data for Mr. Walker’s class and for Mr. White’s class are the same.
D The median for all three classes was the same number of siblings.