The MARR is 15%. Three alternatives are available and the associated cash flow is as follow: A Year First Cost Annual Benefit Useful Life $1,700 $1,000 B $2,100 $3,750 $1,000 $1,000 2 3 6 Answer the following in this format: 1.23 1. The payback period for Alternative Ais 2. The payback period for Alternative B is 3. The payback period for Alternative C is should be selected. (Enter Based on Payback period analysis, Alternative only the letter)