The correct answer is A woman thinks her marriage will fail, so she stops being affectionate with her husband and then he leaves.
A self-fulfilling prophecy is a prediction that someone makes about their future. In this case, the woman thinks her marriage will fail.
Then, the person will take actions that increase the likelihood that this event will happen. In the above example, the woman stops showing affection.
Then, if the event actually takes place, the person can say that they knew all along that this was going to happen. This fulfills their previous prediction.