demand. D. demand and supply both shifting in. 10. Suppose a recent and widely circulated medical article reports new benets of exercise. Simultaneously, the price of The parts needed to make bikes falls. What is The likely effect on the equilibrium price and quantity of exercise bikes sold? A. Price of exercise bikes decreases and quantity sold remains the same. B. Price of exercise bikes increases and quantity sold also increases. C. Price of exercise bikes remains the same and quantity sold increases. D. The change in price is ambiguous, but the quantity sold increases