Which statement is true about a dot plot?

a. a dot plot shows the median of a data set.
b. a dot plot shows the first quartile, but not the second quartile of any given data set
c. a dot plot shows the frequency of the individual values of any given data set.
d. a dot plot shows the frequency of an interval of values of any given data set.
e. a dot plot gives information about the average of any given data set.