Answer:
the higher price elasticity of demand
Step-by-step explanation:
A monopoly is when there is only one firm operating in an industry.
Price discrimination is when a producer sells the same good for different prices in different markets.
Elasticity of demand measures the responsiveness of quantity demanded to changes in price.
Demand is elastic when a change in price has greater effect on the quantity demanded.
A monopoly would charge the lower price for customers with a higher elasticity of demand because if price is high consumers would reduce the quantity demanded and the revenue of the monopoly firm would fall.
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