Im pretty sure the answer is A. ASL and written English
A market is in equilibrium if at the market price the quantity demanded is equal to the quantity supplied. The price at which the quantity demanded is equal to the quantity supplied is called the equilibrium price or market clearing price and the corresponding quantity is the equilibrium quantity.
The right answer is eum because 'him' is the object in the sentence. In Latin the object always gets expressed by using the accusative . The accusative form of is, ea, id ~ is 'eum'!
