Which of the Following Statements Is True Regarding IRR

Which of the following statements is true regarding IRR?

A) The cash flow generated by the product of the project for the first three years is considered.
B) The company assumes that all of the annual cash flows will be positive.
C) Cash flows are assumed to be constant from year to year and impervious to external factors.
D) The inputs to the IRR calculation are the net cash flow for each year where at least one of them is negative and at least one of them is positive.
E) The IRR method is considered inferior to the simple payback method.