Government officialsare______ people and they should____the people heart and soul.

A．servants of; serve

B．service for; serve

C．servants of; serve for

D．servants for; serve of

行政机关对于申请人提出的行政许可申请材料，若发现存在可以当场更正的错误，应当( )。

A．退回申请材料

B．允许申请人当场更正

C．替申请人更正

D．不予受理