— Why did you leave without a word of warning to John?

— But what _____ otherwise? He never likes to listen to me.

A. could I do

B. could I have done

C. must I have done

D. should I do

以下（）属于劳动合同法调整的对象。

A、农业劳动者

B、现役军人

C、家庭保姆

D、国家机关工勤人员