Question

A variable expense is a _____.

cost that stays the same from month to month
cost for completing a budget
cost listed in a budget
cost that changes

Answer 1

The word variable comes from a root word "vary" which means to differ or not constant. Now, applying this to the given item, the variable expense means the costs that changes. The answer is therefore the fourth choice. 
 

Answer 2

the answer is the third option.