In the long run, the output level is determined by

When there is a positive externality

A) the marginal social benefit received by consumers is greater than the marginal private benefit. B) the marginal private benefit received by consumers is greater than the marginal private cost. C) the marginal private benefit received by consumers is greater than the external benefit. D) the marginal private benefit received by consumers is greater than the marginal social benefit.

If the cost of producing a good rises for sellers, then how will this affect the market equilibrium for that good? a. Price will rise and quantity will fall. b. Price will fall and quantity will rise. c. Price and quantity will both rise

d. Price and quantity will both fall.