When a government declares a state of emergency, widespread price ceilings generally go into effect and shortages of goods in high demand develop. Economic analysis indicates A. price ceilings tend to encourage rapid expansion in the supply of these desired goods. B. this is a very effective way to ensure those who most need these goods get them. C. these shortages would disappear if market prices were allowed to work. D. these price controls help to discourage consumers from buying more than they need, thus eliminating hoarding