Question 2 Not yet answered Marked out of 50.0o P Flag question The EUAC of the challenger for an economic life of 5 years is $8,500. The marginal cost of the defender is provided in the table below. Determine when the defender should be replaced. Year 4 Marginal7 Cost, S 7,500 8,000 8,500 9.0009,500 Select one: A. Never B. At the end of year 3 C. At the end of year 2 D. At the end of year 1