What can we generally say about the correct use of net present value calculations in the evaluation of investment projects, and the execution of investment projects with positive net present value? a) That the investment project will contribute to positively accounted profits in all periods of the projects' lifetime. b) That the expected return on the investments the company makes is greater or equal to the return the owners can get by. investing in other projects with similar risk c) That the cash flow from the project is positive at all times. d) That the internal rate of return of the projects being completed is less than the required rate of return on the company's total capital