Which of the following statements is false? a. fixed costs are never relevant. b. variable costs are never relevant. c.usually, variable costs are irrelevant. d. step costs are irrelevant when a decision alternative requires moving outside of the existing relevant range. e. all of these choices are correct.

a. Fixed costs are never relevant.

Explanation:

Fixed costs represent those costs which remain constant irrespective of the level of output.

Examples of fixed costs would be rent of the factory. No matter what be the production in the factory, a fixed factory rent will always be payable.

Variable costs represent those costs which change or vary with the level of output or production. Variable costs are relevant for decision making process. e.g commission on sales which is payable as a specific percentage of value of sale (which varies).

Fixed costs are usually not considered relevant for decision making.

the correct answer is "nuclear power plants do not pollute the air". unlike fossil fuel-fired power plants, nuclear power plants do not produce chemicals or other components that could pollute the air. nuclear reactors work with uranium, creating energy by splitting the atoms in a fission chain reaction, which not results in the formation of carbon dioxide or other greenhouse gases.

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