I think it was nearly 20 years.
C. The Inferno was Dante's greatest literary work.
They usually settled outside the city walls.
The kind of variable in the responses “Democrat”, “Republican”, “Independent”, “Other”, and “No Response” is a categorical variable since the choices does not associate with any kind of unit.
Literally speaking, categorical variables are variables that fall into a specific category. Categorical variable is also known as qualitative variable.