Refer to the Diagrams Below in Which Figures (A) and (B)

question 7

Multiple Choice

Refer to the diagrams below in which figures (a) and (b) show demand curves reflecting the prices Alvin and Elmer are willing to pay for a public good, rather than do without it.If the marginal cost of the optimal quantity of this public good is $10, the optimal quantity must be:

• A)1 unit.
• B)2 units.
• C)3 units.
• D)4 units.

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