Suppose Michigan's NO_X Abatement Standard for Existing (E) Sources Is

Multiple Choice

Suppose Michigan's NO_X abatement standard for existing (E) sources is 4 units and the EPA's standard for new (N) sources is 10 units and that MAC_E = 1.8A_E and MAC_N = 1.2A_N. To meet the same combined abatement level of 14 but in a cost-effective manner, the standards for each should be

A) A_E = 7; A_N = 7
B) A_E = 4.8; A_N = 7.2
C) A_E = 5.6; A_N = 8.4
D) none of the above