The following four investment opportunities, of equal risks, are available, but have different capital costs and durations as follows. Use the appropriate techniques of investment analysis to select the most economic investment alternative. All or part of the money can be invested elsewhere at a rate of 20%. In Thousands of Dollars Project 0 1 2 3 4 5 6 7 8 9 A -450 150 150 150 150 150 B -550 300 210 147 103 72 C -1,000 400 350 300 250 200 150 100 50 D -1,500 500 475 450 425 400 350 300 250 200