I believe that the answer is C. Hallucinogens but i don't know much about addictions.
The chemical substance is a nutrient
- start at least a WEEK before and not last minute
- go over flash cards (you can make your own or find some on quizlet)
- study with some friends (go through information over a video call, etc.)
- read over it, say it aloud, and write it down
- take frequent breaks and drink water (study for 20 minutes, take a break for 5)
- study in a environment that works for you (good lighting, quiet, clear of distractions)
- sleep on the information you learn
