Option 3: (A), (B), (C) and (D) -> Economic agents are individuals, groups, or entities that make economic decisions and participate in economic activities. All four options listed are economic agents: Consumers make purchasing decisions; Institutions like banks and corporations engage in financial and business activities; Producers make production and supply decisions; and Government formulates economic policies, collects taxes, and provides public goods. Therefore, all options (A), (B), (C), and (D) are economic agents. -> correct