12 0 / 1 Figure 5-5 Figure 5-5 shows a market with an externality. The current market equilibrium output of Q 1 is not the economically efficient output. The economically efficient output is Q 2. Refer to Figure 5-5. If, because of an externality, the economically efficient output is Q 2 and not the current equilibrium output of Q 1, what does D 1 represent? Show answer choices the demand curve reflecting external benefits the demand curve reflecting social benefits the demand curve reflecting private benefits the demand curve reflecting the sum of private and social benefits