Questions: "Macroeconomics is the part of economics concerned with individual units such as a person, a household, a firm, or an industry." This statement is: normative and correct. positive but incorrect. positive and correct. normative but incorrect.

The answer is B: positive but incorrect.

Explanation for each option:

• Normative and correct: This option is incorrect because the statement is not normative. Normative statements are subjective and based on opinions or what ought to be. The statement in question is attempting to describe what macroeconomics is, which is a factual claim, not an opinion.

• Positive but incorrect: This is the correct option. Positive statements are objective and based on facts, describing how things are. The statement is incorrect because macroeconomics is not concerned with individual units like a person, a household, a firm, or an industry. Instead, macroeconomics deals with the economy as a whole, focusing on aggregate measures such as national income, overall employment, inflation, and economic growth.

• Positive and correct: This option is incorrect because, while the statement is positive, it is not correct. As explained above, macroeconomics does not focus on individual units.

• Normative but incorrect: This option is incorrect because the statement is not normative. It is attempting to describe a factual aspect of economics, not provide an opinion or value judgment.