When Data Is Collected Using a Qualitative, Nominal Variable, I

When data is collected using a qualitative, nominal variable, i.e., male or female, what is true about a
Frequency distribution that summarizes the data?

A) Upper and lower class limits must be calculated.
B) Class midpoints can be computed.
C) Number of classes corresponds to number of the variable's values.
D) The "2 to the k rule" can be applied.