图幅相同的下列四幅地图，表 示内容最简略的是[ ]

A．世界地图

B．中国地图

C．江苏地图

D．泰州地图

Thank you for all your hard work last week. I don't think we ______ it without you.[      ]

A. can manage

B. could have managed  

C. could manage  

D. can have managed