Questions: A primary difference between macroeconomics and microeconomics is A. There are no true differences between microeconomics and macroeconomics. B. Microeconomics examines individual markets while macroeconomics examines the economy as a whole. C. Microeconomics is concemed with present decisions while macroeconomics is concerned with future decisions. D. Microeconomics is concerned with market economies while macroeconomics is concerned with centrally-planned economies.

The answer is B. Microeconomics examines individual markets while macroeconomics examines the economy as a whole.

This statement is incorrect. There are distinct differences between microeconomics and macroeconomics, as they focus on different aspects of economic activity.

This is the correct answer. Microeconomics focuses on the behavior of individual consumers, firms, and industries, and how they interact in specific markets. Macroeconomics, on the other hand, looks at the economy on a broader scale, including national income, overall price levels, and aggregate demand and supply.

This statement is misleading. Both microeconomics and macroeconomics can be concerned with present and future decisions. The primary distinction lies in the scope of their analysis, not the time frame.

This statement is incorrect. Both microeconomics and macroeconomics can be applied to any type of economic system, whether it is a market economy, a centrally-planned economy, or a mixed economy. The distinction is in the level of analysis, not the type of economy.