Answer:
d. nicotine
Step-by-step explanation:
Nicotine is the chemical in tobacco that makes tobacco addictive. Nicotine results in long-term brain changes creating addiction. Nicotine enters directly into blood stream and stimulates adrenal glands to release adrenaline (epinephrine) causing an increase in :
- Blood pressure
- Heart rate
- Respiration
After entering the blood, it quickl enters the brainand triggers a cascade of biochemical reactions that are interpreted by the brain as rewarding.It is a legal drug too
Hence in the given scenario, Betty is probably addicted to Nicotine.