This kind of vacillation not only impairs the parents" ability to set limits， it also sours the parent-child relationship to some degree.

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