The estimated benefits from a capital budgeting project are expected as cash flows rather than income flows because

A $$ it is more difficult to calculate income flows than cash flows

B $$ it is cash, not accounting income, that is central to the firm's capital budgeting decision

C $$ this is required by the accounting profession

D this is required by the Internal Revenue Service $($IRS$)$ and enforced through filings with the Securities and Exchange Commission $($SEC$)$