If, at the current amount of pollution, its marginal social benet is greater than its marginal social cost: 0 there is too little pollution. O the externality is minimized. O society is achieving the optimal amount of pollution. 0 there is too much pollution. If marginal utility is diminishing, the marginal utility curve slopes , since each additional unit of the good consumed yields satisfaction than the unit that preceded it. Q upward; more C) upward; less O downward; less 0 downward; more The marginal utilities of the first three units of a good consumed are 300, 250, and 225, respectively. The total utility for the third unit is: O 775 O 250 O 225 O 725fourth Twix bar is: (Table: Marginal Utility per Dollar of Twix) Use Table: Marginal Utility per Dollar of Twix. The marginal utility of the Table: Marginal Utility per Dollar of Twix Quantity of Twix bars Total utility 0 0 1 6 2 10 3 13 4 15 5 16 10. O 16. O 13. O 2