When the old man saw some litter on the ground, he quickly          .

A．picked it up

B．picked up it

C．picked them up

D．picked up them.

公安机关依法对负有治安责任的社会团体、组织及其个人实施治安行政管理的一种权力属于( )。

A．治安行政处置权

B．治安行政处罚权

C．治安监督检查权

D．治安行政强制权