Betty has tried to stop using a particular drug permanently, but her attempts have been unsuccessful. When she stops using, she experiences irritability and difficulty concentrating. Even though she has emphysema, a serious physical disorder, she continues to use it. Surprisingly, it is a legal drug. To which drug is Betty probably addicted?

a. caffeine
b. alcohol
c. marijuana
d. nicotine

d. nicotine

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 :

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.

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explanation:

well since twins have about the same dna they dont have one think in common which is the figer print. nobodys fingerprint is the same. if your using twin you would most likely get around the same results for both of them because of the genetics.. i hope this