Which of the following statements regarding Excel's NPV and IRR functions is NOT true?

A. Both functions require that cash flows are evenly spaced across time

B. When using both functions, the initial cash flow (the cash flow at time zero) should be included inside the function.

C. Excel 's IRR function uses trial-and-error (similar to Goal Seek) to identify the IRR

D. Both functions can handle a series of cash flows that are not consistent in magnitude