What is the following an example of an open-ended question?

This question is a closed-ended question that can be answered with a simple "yes" or "no." It restricts the respondent's ability to provide any additional information or context beyond their marital status, failing to invite a more detailed response.

Similar to the previous choice, this question is closed-ended, allowing only a "yes" or "no" answer. It does not encourage the respondent to elaborate on their situation or provide insights about their babysitting arrangements, thereby limiting the depth of the conversation.

This question is also closed-ended, requiring only a "yes" or "no" response. It does not prompt the respondent to discuss their reasons, feelings, or any future plans in detail, which are essential for a more comprehensive understanding of their perspective.

While this question seeks a numerical answer, it is still closed-ended. It confines the response to a specific fact without inviting the respondent to elaborate on their experiences, challenges, or joys related to parenthood.