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

An open-ended question is designed to encourage a full, meaningful answer using the subject's own knowledge or feelings. It allows the respondent to explore their thoughts and provides a depth of information that closed-ended questions cannot elicit.

The choice that exemplifies an open-ended question is seeking information about the medications a person has taken for their symptoms. This type of question invites the respondent to elaborate and share their experiences, motives, and specific details regarding their medication use, rather than providing a simple 'yes' or 'no' answer.

The other options represent closed-ended questions that typically require a brief response. For example, asking if someone is feeling better or if they have any allergies can usually be answered with a straightforward affirmative or negative response. These types of questions restrict the flow of conversation and do not allow for deeper insight into the individual’s situation or history.