The internal rate of return (irr): i. rule states that a typical investment project with an irr that is less than the required rate should be accepted. ii. is the rate generated solely by the cash flows of an investment. iii. is the rate that causes the net present value of a project to exactly equal zero. iv. can effectively be used to analyze all investment scenarios. i and iv only ii and iii only i, ii, and iii only ii, iii, and iv only i, ii, iii, and iv