In a market with positive externalities, how does the marginal social benefit curve affect the equilibrium quantity compared to the traditional demand curve?

• A. The equilibrium quantity is irrelevant in this context.
• B. The equilibrium quantity is lower when considering the marginal social benefit curve.
• C. The equilibrium quantity is higher when considering the marginal social benefit curve.
• D. The equilibrium quantity remains unchanged.

Answer: (C)