When the total product curve is falling, the: / » Micro Economics 1 solved MCQs / By admin Question: When the total product curve is falling, the: A. Marginal product of labor is zero. B. Marginal product of labor is negative. C. Average product of labor is increasing. D. Average product of labor must be negative Answer» b. Marginal product of labor is negative. Note: The above multiple-choice question is for all general and Competitive Exams in India.