I'm pretty sure the answer is: B. How does secondhand smoke affect our health?
According to Google, an open-ended question is designed to encourage full, meaningful answers, unlike a closed-ended question, which can be answered with "yes", "no" or any other short answer. B seems like the best option since the other questions do not encourage a full or lengthy answer.
"However, there are people who care!"
is this what you had in mind? Or would you like it a little longer?
Answer:
the answer is Peter studies in his room
Explanation:
Hope this helps