Answer:
C. This variable is categorical
Explanation:
A categorical or discrete variable is one that has two or more categories (values). There are two types of categorical variable, nominal and ordinal.
A nominal variable has no intrinsic ordering to its categories. For example, gender is a categorical variable having two categories (male and female) with no intrinsic ordering to the categories.
An ordinal variable has a clear ordering. For example, temperature as a variable with three orderly categories (low, medium and high).
Hence, the variables used in this scenario is an ordinal variable because it has a clear ordering.