当初步设计有详细设备清单时，按( )编制设备安装工程单位工程概算最为准确。

A．预算单价法

B．概算指标法

C．扩大单价法

D．估算指标法

I hope there will be ______ cars and ______ pollution in the future, thus people will live longer. [ ]

A. more, less

B. fewer, less

C. fewer, more

D. fewer, fewer