（）项不属于生产计划中的期量标准。

A、月产量

B、生产间隔期

C、生产周期

D、节拍

An analyst does research about common probability distributions. Compared to a normal distribution, a return distribution with negative excess kurtosis most likely has :（）

A. more extreme outcomes.

B. less observations clustered around the mean.

C. a longer tail on the left side than on the right side.