A correct option is option (a), i.e. 3 units
What is the definition of the equilibrium quantity?
When a product is in equilibrium quantity, there is neither scarcity nor a surplus on the market. When supply and demand cross, the amount of a good that consumers desire to buy is equal to the amount that its manufacturers are supplying.
What is equilibrium quantity increase?
Although the impact on the equilibrium quantity cannot be determined, a rise in demand and a decrease in supply will result in an increase in the equilibrium price. Consumers now place a higher value on goods, and producers must charge a higher price to offer the goods; as a result, prices will rise for all quantities.
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