下列属于公务员回避规定中的拟制亲关系的是（）。

A.养父母与养子女关系

B.叔侄关系

C.同父异母的兄弟关系

D.亲家关系

Children are _____ to meet with setbacks (挫折) as they grow up, so their parents don't have to worry about it.[ ]

A. possible

B. due

C. necessary

D. bound