They were all standing on the playground,           white suit.

A．all wearing

B．all wore

C．all were wearing

D．all of whom wearing

成年男性的高血压患病率一般是8%。现某地抽样调查了1200名成年男性，发现150人患有高血压，欲比较该地区成年男性高血压患病率是否高于一般成年男性，应该选用的检验方法是

A．样本串与总体率的u检验
B．两样本率的u检验
C．四格表的精确概率法
D．四格表的χ²检验
E．行×列表的χ²检验