I'd say D because certain synthetic hallucinogenic drugs can cause convulsions and possible overdose
The only one that would make sense not doing is breathing in slowly because you want the medicine to go in quickly to the airways and not get stuck in your mouth.
I shall prepare you a list for you to ken rather you have a migraine or not. :) So the first signs would be how deplorable is the pain? For a migraine the pain would be moderate to server pain in your head, your head will throb or pound and that could affect your whole head and peregrinate from side to side. Now the other denotements of a migraine is if you are sensitive to Light, noise, or certain oders. Third sign would be if your vision is blurry. The Fourth sign would be if you feel sick like you are about to throw up or your have pain in your abdominal. The fifth sign would be if you have a lose of appetite. Sixth sign would be if you are feeling Cold or Sultry. Seventh would be if you are pale.
I hope this helps you very much!
It's important to only trust health information that is backed up by scientific proof because people can put things out there that might not be true, or even worse, make your health worse, whether that health is physical, mental, or emotional.