Perkins Corporation is considering several investment proposals, as shown below: Investment Proposal A B C D Investment required $ 96,000 $ 120,000 $ 72,000 $ 90,000 Present value of future net cash flows $ 115,200 $ 180,000 $ 100,800 $ 168,000 If the profitability index is used, the ranking of the projects from most to least profitable would be: B, D, A, C B, D, C, A D, B, C, A A, C, B, D