Use Figure: Negative Externality and Deadweight Loss I

Multiple Choice

Use Figure: Negative Externality and Deadweight Loss I. The figure shows the marginal benefit, marginal private cost, and marginal social cost that are associated with producing a good. At the free-market equilibrium, the deadweight loss resulting from the externality is:
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Figure: Negative Externality and Deadweight Loss I

A) $30.
B) $40.
C) $50.
D) $60.