If average variable costs fall as output grows: / » Micro Economics 1 solved MCQs / By admin Question: If average variable costs fall as output grows: A. Marginal costs must also be declining. B. Fixed cost must also be declining. C. Total cost must also be declining. D. Average cost must be below average variable cost. Answer» c. Total cost must also be declining. Note: The above multiple-choice question is for all general and Competitive Exams in India.