​Variable costs are

A) ​costs that vary with output
B) not important in decision making
C) costs that do not vary with output
D) ​equal to total costs

Variable Costs

Costs that change in proportion to the level of output or activity.

Total Costs

The sum of all expenses associated with the production of goods or services, including both fixed and variable costs.

Output

The amount of goods or services produced by a person, machine, factory, or country.