This kind of vacillation not only impairs the parents' ability to set limits, it also sours the parent-child relationship to some degree.
A.The uncertainty on the part of parents makes parent-child relationship bitter. B.This kind of response to children s demands disappoints both parents and children. C.Parents' hesitation also does harm to their relationship with their children. D.This attitude of parents also makes both parents and children very unhappy.正确答案C
