8, Figure 4-20 50 Tarice 45 40 35+ 30 25 4 20 + 15 10 D 100 200 300 400 500 600 700 800 900 quantity Refer to Figure 4-20. At a price of $15, A. quantity demanded exceeds quantity supplied. B. there is a shortage. C. there is an excess demand. D. All of the above are correct