A frequency distribution is obtained by

A. listing the values in sets of data individually.
B. taking the difference between the highest and the lowest value in each set of data.
C. summing the values of a set of data and dividing by the number of values in the set.
D. dividing a set of data to show patterns.

My answer is A

I disagree.

A frequency distribution is obtained by listing the values in sets of data individually. In order to create a frequency distribution, you need to organize and count the number of times each value occurs in the dataset. This can be done by listing all the unique values in the dataset and tallying the frequency of each value. So your answer of A is correct.