Which of the following statements is most correct?

a. the cash flows that are relevant to an investment's evaluation are the incremental, after-tax cash flows.

b. sunk costs can be altered by a firm's future investment decisions

c. because a business has no choice about paying taxes, taxes are generally ignored in evaluating capital projects.

d. if an old asset has been fully depreciated to a book value of zero and is sold for less than its original cost, there is no tax liability because the asset has already been written off.

e. if a project is financed by issuing additional bonds, the interest paid on those bonds is deducted when finding a project's expected future cash flows.