Which of the following statements correctly describes the difference between uniform standards, a Pigouvian tax, and a cap-and-trade system? Select only one.a. Uniform standards allow firms to trade pollution permits, a Pigouvian tax mandates equal pollution reduction across all firms, and a cap-and-trade system sets a price for each unit of pollution emitted.b. Uniform standards require all firms to reduce pollution by the same amount, a Pigouvian tax charges firms a fee per unit of pollution, and a cap-and-trade system sets a limit on total pollution and allows firms to buy and sell pollution permits.c. Uniform standards are designed to generate government revenue, a Pigouvian tax is a market-based approach to limit pollution, and a cap-and-trade system requires all firms to reduce pollution equally.d. Uniform standards provide financial incentives for firms to reduce pollution, a Pigouvian tax restricts the total pollution, and a cap-and-trade system charges firms