Figure 10-4 -Refer to Figure 10-4, Graph (B) and Graph (C). the and Graph

Multiple Choice

Figure 10-4

-Refer to Figure 10-4, Graph (b) and Graph (c) . The installation of a scrubber in a smokestack reduces the emission of harmful chemicals from the smokestack. Therefore, the external benefit of smokestack scrubber installation is represented by

A) Q₃ − Q₂.
B) Q₅ − Q₄.
C) P_3a − P_3b.
D) P_4a − P_4b.