Not having worked out the problem, _____ leave the office. [ ]

A. so he was not allowed to

B. and he didn't want to

C. the teacher couldn't make him

D. he couldn't free himself to

行政执法人员利用职务上的便利索取或者收受他人财物据为已有应当承担的责任是：（）

A、构成犯罪的依法追究刑事责任

B、不构成犯罪的信用证法给予行政处分

C依法给予党纪处分

D、退还财物并向当事人赔礼道歉