A columnist is discussing how the efficient quantity of output for a good or service is determined. These two statements appear in his column: Statement 1: The equilibrium quantity of production for a good or service can be considered efficient as long as the marginal social benefit of that quantity is greater than its marginal social cost. Statement 2: Subsidies and quotas typically result in production of a good or service in quantities at which the marginal social cost exceeds the marginal social benefit. Are these statements correct Statement 1 Statement 2 （）

A. Correct        Correct

B. Correct        Incorrect

C. Incorrect       Incorrect

绘图题：画出测试二极管正向伏安特性的电路。