1. The alternatives shown are to be compared on the basis of annual worth. At an interest rate of 10% per year, the values of (n) that you could use in the (A/P, I, n) factors to make a correct comparison by the annual worth method are: B first cost, annual operating costs salvage value, life years -1500 -1000 1300 -9000 -400 1500 W 4 8 O A N =4 years for A and 4 years for B B. Neither (A) nor (B) OC. N=4 years for A and 8 years for B D. Either (A) or (B)