Answer:
correct option is D. consumers who do find housing at the controlled rent gain
Explanation:
we know that effective rent ceiling lowers the market rate below equilibrium rent
this will increasing the quantity demanded of housing and decreases quantity supplied of housing
so there will be shortage of these and those consumers who can find housing at lower rent gains in the form of an increase in consumer surplus
so correct option is D. consumers who do find housing at the controlled rent gain