Card 6 / 47: The quantity demanded will equal the quantity supplied at a free market equilibrium and also when:
A) a price floor is established above the equilibrium price.
B) a shortage of a commodity persists.
C) a price ceiling is established below the equilibrium price.
D) an effective price ceiling exists and the government is able to prevent the development of a black market.
E) none of the above cause quantity demanded to equal quantity supplied.

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