Less than twenty percent of the employees in their company are women. That is to say,men are in the ___.[ ]

A．majority  

B．activity

C．possibility  

D．minority

长度为n的顺序存储线性表中，当在任何位置上插入一个元素概率都相等时，插入一个元素所需移动元素的平均个数为 【5】 。