Given a MARR of 10%, project A requires an initial investment of exist20,000 and will yield a rate of return of 15% per year. Alternative C, which requires a S30,000 investment, will yield 20% per year. Which of the following statements is true about the rate of return on the incremental cash flow if Alternative A is the economically preferred alternative? It is greater than 20% per year. It is between 15% and 20% per year. It is between 10% and 15% per year. It is less than 10% per year