Which of the following help to correct for the market failure of imperfect information?

A) truth-in-advertising regulations
B) used car warranties
C) medical licensing
D) All of the above are correct.

Imperfect Information

A market condition where all parties do not have equal access to all relevant information, leading to inefficiencies.

Market Failure

A situation where the allocation of goods and services by a free market is not efficient, often leading to a net social welfare loss.