The couple have tried hard to save their troubled marriage ______ their children.
A、in contrast to
B、rather than
C、for the sake of
D、regardless of
【正确答案】：C
【题目解析】：in contrast to与...形成对照；rather than而不是；for the sake of为了；regardless of不顾，不管句意：为了他们的孩子，这对夫妇努力挽救他们陷入困境的婚姻。
