Drug users living in the United States. According to statistics, currently there are approximately
A. 22 million
B. 15 million
C. 10 million
D. 5 million
Please select the best answer from the choices provided.
B
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D
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A. 22 million

Explanation:

According to the statistics, there are currently about 22 million drug users living in the United States. This number only keeps growing, which is highly concerning. According to the National Survey on Drug Use and Health, 19.7 million Americans aged 12 and older battled a substance use disorder in 2017. There are many causes of addiction, including genetics, environmental factors (e.g. a chaotic home environment, abuse, parent’s drug use, peer influences poor academic achievement, etc), and mental health disorders.

what effect does exercise have on the nervous system?

the answer is c.