Figure 18.2.1 -Refer to Figure 18.2.1 Above. in Which of the Following

Multiple Choice

Figure 18.2.1
-Refer to Figure 18.2.1 above. In which of the following instances is the cost of reducing emissions less the harm done from emissions?

A) When the level of emissions is 6 units
B) When the level of emissions is 12 units
C) When the level of emissions is 18 units
D) In all of the cases above