I would go with B. Brainliest please?!
Answer:
Yes.
Explanation:
Doctors (and nurses) take an oath about helping people (not the whole thing, but I don't know it as I am not a doctor or nurse). If the doctor is understanding, they might even help set up a payment plan.
A topic is the main idea of a writing. In this case, the topic of the essay is Yellowstone National Park because the essay talks about the national park itself.