The correct answer is: A. Fixed cost
Excise tax is a type of tax that is levied on a specific good or service. It is a fixed cost because it does not vary with the quantity of goods or services produced. For example, a tax on gasoline is an excise tax. The amount of tax paid per gallon of gasoline is the same regardless of how many gallons are purchased.
Fixed costs are costs that do not change with the level of output. They are also known as overhead costs. Examples of fixed costs include rent, insurance, and depreciation.
Variable costs are costs that change with the level of output. They are also known as direct costs. Examples of variable costs include labor, materials, and utilities.
Implicit costs are costs that do not involve a direct monetary outlay. They are also known as opportunity costs. Examples of implicit costs include the opportunity cost of capital and the opportunity cost of time.
Is not a part of cost is not a correct answer because excise tax is a cost.