The best description of the mathematical formula to determine the rate of return or the internal rate of return (IRR) where i* represents the rate of return is?

a)Solve for i* such that the present worth (PW) of two projects' cash flows are equal to each other

b)Solve for i* as the cash inflows divided by the cash outflows

c)Solve for i* where the present worth (PW) of a cash flow equals the MARR

d)Solve for i* where the present worth (PW) of a cash flow at i* equals 0