Which of the Following Best Describe the Term Marginal Cost

Multiple Choice

Which of the following best describe the term marginal cost or incremental cost.

A) Investigation of what happens to NPV when only one variable is changed.
B) The determination of what happens to NPV estimates when we ask what-if questions.
C) The degree to which a firm or project relies on fixed costs.
D) The change in costs that occurs when there is a small change in output.
E) Taking into account the managerial options that are implicit in a project.