Bob Found an Error in the Following Frequency Distribution $$\begin{array} { c c } \text { Class } & \text { Frequency } \\1 - 10 & 2 \\11 - 20 & 6 \\25 - 30 & 8 \\31 - 40 & 12 \\44 - 50 & 6\end{array}$$

Bob found an error in the following frequency distribution. What is it? $$\begin{array} { c c } \text { Class } & \text { Frequency } \\1 - 10 & 2 \\11 - 20 & 6 \\25 - 30 & 8 \\31 - 40 & 12 \\44 - 50 & 6\end{array}$$

A) The class limits are overlapping too much.
B) The classes are not collectively exhaustive.
C) There are too many classes by Sturges' Rule.
D) The first class must start at 0.