15. Which of the following is the ultimate decision rule for a project analysis? A. net present value rule B. internal rate of return rule C. profitability index rule D. average accounting return rule I 16. For an independent project with conventional cash flows, which of the following is a definite indicator of an "accept" decision? A. positive internal rate of return B. profitability index greater than zero C. zero net present value D. internal rate of return greater than the required rate of return 17. Ford is considering a project to make a new brand of gas-saving car. In that project, the sales of the new brand will decrease the sales of existing brands of cars. This decrease in the sales of existing brands of cars is an example of A. negative side effect B. fixed cost C. sunk cost D. opportunity cost