Answer:
A. cerebrum, cerebellum, brain stem, and diencephalon.
Explanation:
More than 4 million Americans take opioid prescription pain relievers for nonmedical uses. More than 400,000 Americans use heroin, a powerful opiate drug. Many people report misusing prescription opioids before starting to use heroin. Each year, more than 28,000 Americans die from opioid overdoses.
