please answer all as they are straight to the point, i will rate but i need them asap

The following tables show the marginal costs of a defender over its remaining four years of service life. If the challenger's minimum EUAC in $28,138, what is the most appropriate replacement decision? Year 1 2 Marginal cost $29.788 $25,088 $26.738 $31.538 4 A No decision can be made unless additional calculations are made OB. Replace the defender now since the challenger EUA is lower than first year defender MC Oc. Keep the defender since the lowest marginal costs are lower than the challenger minimum EUAC Dent According to the US BLS, the CPI value grew from 1474 in March 1994 to 236.3 in March 2014. Based on this calculate the average annual general inflation rate over that period O A 3.02% OB 2.39% OG 1.88% OD 2.27% TERED The following tables show the marginal costs of a defender over its remaining four years of service life. If the challenger's minimum EUAC in $28,138, what is the most appropriate replacement decision? Year 1 2 Marginal cost $29.788 $25,088 $26.738 $31.538 4 A No decision can be made unless additional calculations are made OB. Replace the defender now since the challenger EUA is lower than first year defender MC Oc. Keep the defender since the lowest marginal costs are lower than the challenger minimum EUAC Dent According to the US BLS, the CPI value grew from 1474 in March 1994 to 236.3 in March 2014. Based on this calculate the average annual general inflation rate over that period O A 3.02% OB 2.39% OG 1.88% OD 2.27% TERED