These all sound like ways to make or break your interview, but since you have to pick one, I would say it might be C) mood.
Hope I could help!
Answer:A:trains, books, plans
B:training, booking, planning
Explanation:
In the context of an adjective used to describe pain, we can look at the answer choices:
Silent pain seems like an odd choice for someone to notify a doctor about, so that is probably not the answer.
Thoughtful does not describe pain.
Responsive does not describe pain.
Severe pain would be a reason for someone to notify a doctor, so this is likely the correct answer choice.