For many cities in the world, there is no room to spread out farther, _____New York is an example.

A．for which

B．in which

C．of which

D．from which

（）管辖范围内委托变电站调度管理部门，负责指导、督促、检查调度权限下划变电站的调度管理工作。

A.县调

B.玉溪电力调度中心

C.生产技术部

D.变电管理所