A city engineer is considering two possible alternatives for a garbage collection system. The following data has been compiled. If the interest rate is 4%, determine the AB/AC ratio. Year 0 1-30 System A -$150,000 10,000 System B -$175,000 12,000 a) Circle the correct answer below. Circle only one answer. (5 points) A. 0.96 B. 1.09 C. 2.27 D. 1.38 b) Explain your answer with an incremental benefit to cost analysis. (5 points)