Which of the Following Statements Is FALSE

Which of the following statements is FALSE?

A) The profitability index rule of thumb raises the bar on the NPV to take into account the option to wait.
B) In practice,correctly modeling the sources of uncertainty and the appropriate dynamic decisions usually requires an extensive amount of time and financial expertise.
C) Some firms use the following rule of thumb: Invest whenever the profitability index is below a specified level.
D) Instead of raising the bar on the NPV,the hurdle rate rule raises the discount rate.