---What did the boy do just now?

---He ran______ the road to pick up his ball.

A across                B through                  C by                            D for

按照监督主体的不同，公安执法监督可以分为( )。

A．国家权力机关的监督

B．检察机关、审判机关的监督

C．公民和社会的监督

D．行政监察机关的监督