Because he was assassinated by Serbian rebels. Most of Europe was allied with someone, a tangle of alliances. Serbia was allied Russia. Austria-Hungary didn't like Serbia. Well when the Archduke decided to visit Sarajevo, he was assassinated by a Serbian assassin. Because of that, Austria-Hungary wanted to punish Serbia and declared war. Well Austria-Hungary was allied with Germany and Italy. And Serbia was allied with Russia. Well Russia attacked Austria-Hungary and Russia was allied with both Great Britain and France.... So it triggered a chain reaction like that.
Answer:Price ceiling is when the government of a country mandates producers to sell their commodities below market or equilibrium price.
Explanation:Price ceiling leads to excess demand as consumers will excessively demand for products with a low price. Economically,the lower the price ,the higher the quantity demanded.
Also,Price ceiling will make producers produce inferior commodities as they will drastically reduce their cost of production which by using counterfeit raw materials.
Lastly,Price ceiling leads to supply shortage as producers are not willing to produce.
The research must pose no more than minimal risk.