The purpose of the demand curve is to allow a firm to examine prices in terms of quantity sold.
What does the Demand Curve show?
The Demand curve shows the price at which various quantities of goods and services are bought and sold in the market.
A firm can therefore use a demand curve to see which prices they can sell their goods and at what quantity.
In conclusion, option A is correct.
Find out more on the demand curve at https://brainly.com/question/1486483.
