Paul is very proud ______ his father because he helps keep our city beautiful. [ ]

A. in

B. of

C. on

D. from

执法人员当场作出行政处罚决定的，应当向当事人出示执法身份证件，填写预定格式、编有号码的行政处罚决定书。行政处罚决定书应等当事人交完罚款后再交付。