Six different alternatives have been proposed for improving the water supply for a city, but only one option can be implemented. Each option has a lifetime of 8 years and the MARR set is 5%. All figures are in millions of dollars. Which alternative should be selected? a. Solve by present worth analysis. b. Solve for annual cash flow analysis. c. Solve by incremental B/C ratio analysis. d. Solve by incremental rate of return analysis.