Which of the following relationships most accurately describes the inefficiency resulting from government imposed production quotas（）

A. Marginal benefit exceeds marginal cost leading to underproduction.

B. Marginal benefit exceeds marginal cost leading to overproduction.

C. Marginal cost exceeds marginal benefit leading to overproduction.

在规定的测量条件下多次测量同一个被测量，从所得测量结果与计量标准所复现的量值之差可以发现并得到恒定的系统误差的（）

A、估计值

B、修正值

C、真值

D、计算值