Which of the following items describes a weakness of the internal rate of return method?

a) The internal rate of return is difficult to calculate and requires a financial calculator or spreadsheet tool such as Excel to calculate efficiently.

b) Cash flows from the investment are assumed in the IRR analysis to be reinvested at the internal rate of return.

c) The internal rate of return calculation ignores time value of money

d) The internal rate of return calculation ignores project cash flows occurring after the initial investment is recovered.