Correct answer is option C
Variable and continuous are the type of data types and interval scale
A variable is any characteristics, number or quantity that can be measured or counted. It can also be called a data item.

Examples of variables are Age, Sex, Country, Income, Class, grades and so on. There are different ways variables can be described according to ways they can be studied, measured and presented. The types of variables are: Numerical variables, discrete variable, nominal variable, continuous variable, categorical variable and ordinal variable.

Continuous data are measured along a continuous scale which can be divided into fractions. It allows for infinitely fine sub – division, which means you compare two items and determine the difference.