Final answer:
The most appropriate question for a nurse to ask a woman after a miscarriage is about her emotional well-being, offering support without being intrusive.
Step-by-step explanation:
The best question a nurse can ask a woman who is leaving the hospital after experiencing a complete spontaneous abortion, also known as a miscarriage, is "How are you feeling emotionally about what happened?" This question is sensitive to the woman's emotional state and provides an opening for her to discuss her feelings if she chooses. It is a non-intrusive way to offer support and acknowledge the emotional impact of the experience. The other options may be perceived as insensitive or too direct immediately following such an event.