专门机关与广大群众相结合的方针，是指导公安机关和人民警察各项活动的基本方针，贯穿于公安工作的各个方面，被( )所确认，并体现在公安人员的纪律中。

A．公安政策

B．纪律

C．公安法规

D．原则

If we _________earlier,we would have had trouble getting good seats. [      ]

A. didn't arrived            

B. haven't arrived

C. hadn't arrived            

D. couldn't arrive