Using the Data Table Shown, What Is the Mean Number

Using the data table shown, what is the mean number of galls found on a set of 30 leaves collected from a plant?
?
Number of galls found on 30 leaves collected from a plant.

$\begin{array}{cc}\begin{array}{l}\text { Number } \\\text { of galls }\end{array} & \text { Frequency } \\\hline 0 & 4 \\1 & 8 \\2 & 9 \\3 & 4 \\4 & 3 \\5 & 2 \\\hline\end{array}$ ?

A) 1.0
B) 1.33
C) 1.66
D) 2.0