We give dogs time, space and love we can spare, and _____, dogs give us their all. [ ]

A. in all

B. in fact

C. in short

D. in return

复审政纪申诉案件，主要采用三种方式：（）。

A.材料审查

B.直接调查

C.与原办案部门共同调查核实

D.书面审查