Which of the following statement is true regarding the estimation of project cash flows?

A. Selling an asset at a gain results in lower taxes being paid by the corporation

B. Straight-line depreciation results in smaller depreciation expenses in the earlier years of an asset's useful life.

C. An increase of a project's net working capital reduces that project's incremental cash flows.

D. Opportunity costs should be excluded from the estimates of a project's cash flows.