Answer:
A
Step-by-step explanation:
Deadweight loss of tax measures the decrease in demand as a result of an increase in tax
Price elasticity of demand measures the responsiveness of quantity demanded to changes in price of the good.
Price elasticity of demand = percentage change in quantity demanded / percentage change in price
If the absolute value of price elasticity is greater than one, it means demand is elastic. Elastic demand means that quantity demanded is sensitive to price changes.
Price elasticity of supply measures the responsiveness of quantity supplied to changes in price of the good.
Demand is less elastic in the short run because there is no enough time for consumers to find suitable and cheaper substitutes. As time goes on, demand becomes more elastic because consumers would have had enough time to find cheaper substitutes
Supply is also less elastic in the short time and more elastic in the long run