How does the marginal social benefit curve differ from the traditional demand curve in the presence of positive externalities?

• A. The marginal social benefit curve is higher than the traditional demand curve because it includes external benefits.
• B. The marginal social benefit curve is irrelevant in the presence of positive externalities.
• C. The marginal social benefit curve is identical to the traditional demand curve.
• D. The marginal social benefit curve is lower than the traditional demand curve because it excludes external benefits.

Answer: (A)