5. "Market Failure" is defined as a situation in which A. voluntary trade makes both buyers and sellers worse off. B. Total Social Surplus is decreased as a direct result of government intervention in the economy. C. situation in which the "free market outcome" is efficient, in that there is a zero Deadweight-Loss at the resulting "free market level of trade." D. the free market outcome is inefficient, in that there is a positive Deadweight Loss at the free market level of trade