The management of Ortega Manufacturing has three different proposals under consideration. The Accounting Department has prepared the following information: A B Initial investment $2,600,000 $2,850,000 $3,000,000 Useful life of equipment 10 years 9 years 10 years Estimated salvage value $100,000 $150,000 $200,000 Estimated annual net $280,000 $285,000 $310,000 income *Management's required rate of return is 15%. (ii). Which of the above proposals has the shortest payback period? Select one: a. Cannot be determined with the given information. b. Proposal B. c. Proposal C. d. Proposal A