Correct Option: A. Obtaining the maximum output from available resources at the lowest cost Detailed Explanation: Economic Efficiency Defined: Economic efficiency is a fundamental concept in economics that refers to the optimal use of resources to produce goods and services. It implies that resources are allocated in such a way that maximizes the total output while minimizing costs. This means that an economy is operating efficiently when it cannot produce more of one good without producing less of another, which is known as Pareto efficiency. Why Option A is Correct: - Maximum Output: Economic efficiency emphasizes the importance of maximizing output. This means using all available resources (labor, capital, land, etc.) to their fullest potential. For example, if a factory can produce 100 units of a product with its current resources, achieving economic efficiency would mean finding ways to produce as close to that maximum as possible.

• Lowest Cost: Achieving the lowest cost is crucial because it ensures that resources are not wasted. If a company can produce the same output at a lower cost, it is more efficient. This aspect of economic efficiency is often analyzed through concepts like economies of scale, where increasing production lowers the average cost per unit.
• Resource Allocation: Economic efficiency also involves the optimal allocation of resources. This means that resources should be directed towards their most productive uses. For instance, if a piece of land is better suited for agriculture than for industrial use, economic efficiency would dictate that it be used for farming.

Why the Other Options are Incorrect: Option B: Conservation of our petroleum resources - While conservation is important for sustainability and environmental reasons, it does not directly relate to the concept of economic efficiency. Economic efficiency focuses on maximizing output and minimizing costs, rather than specifically addressing the conservation of a particular resource. Conservation can be a part of efficient resource management, but it is not the primary definition of economic efficiency. Option C: Equity in the distribution of the nation's wealth - Equity refers to fairness in the distribution of wealth and resources among individuals in an economy. While equity is an important aspect of economic policy and social justice, it is not synonymous with economic efficiency. An economy can be efficient in terms of output and cost but still have significant inequalities in wealth distribution. Therefore, this option does not capture the essence of economic efficiency. Option D: Producing without waste - Although producing without waste is a component of economic efficiency, it is not the complete definition. Economic efficiency encompasses both maximizing output and minimizing costs, which includes reducing waste. However, simply producing without waste does not guarantee that resources are being used to their fullest potential or that costs are minimized. Thus, this option is too narrow to fully represent the concept of economic efficiency. Summary:

• Economic efficiency is about maximizing output from available resources while minimizing costs.
• It involves optimal resource allocation and production processes.
• Options B, C, and D, while related to economic concepts, do not fully capture the definition of economic efficiency.
• Understanding economic efficiency is crucial for analyzing how well an economy utilizes its resources.