18) When comparing two potential projects with different initial cash outflows this scale difference can cause potential conflicting rankings when comparing internal rate of return, net present value, or profitability index. True False 19) In the U.S., taxing authorities allow the fully installed cost of an asset to be written off for tax purposes. This amount is called the asset's - A) depreciable basis B) operating profit c) opportunity cost d) sunk cost 20) The of return is a measure of relative risk for either an individual security or portfolio. A) coefficient of variation B) correlation coefficient C) standard deviation D) covariance