A fire hose has a（）.

A.male coupling at both ends

B.female coupling at both ends

C.female coupling at the nozzle end and a male coupling at the hydrant end

D.male coupling at the nozzle end and a female coupling at the hydrant end

在政治行为中（）追求选票极大化

A.政府部门

B.特殊利益集团

C.投票者

D.政治家