Answer:
the supply curve must be vertical
Explanation:
A horizontal supply curve is perfectly inelastic. This means that the price of a good or service will not affect the quantity supplied. In other words, the quantity supplied is not affected by an increase or a decrease of the good's price. This type of situation is basically theoretical, or may exist for a very short period of time where the availability of a good is very low. But in the real world, it cannot hold for significant periods of time.
