Question

addiction follows soldiers home

• during the vietnam war in the 1960s and 70s, u.s. soldiers experimented with drugs like heroin while in vietnam.
• when the soldiers returned home to the united states, many returned with very challenging addictions.
• this rampant addiction among soldiers, in part, led to a heroin epidemic in the u.s.
• in 1970, the comprehensive drug abuse prevention and control act was passed. this bill began the process of categorizing substances for the first time.
• certain drugs have different impacts on the person taking them. by categorizing drugs, different legal repercussions could also be enforced based on the type of substance being used.

what process did the comprehensive drug abuse prevention and control act begin?
categorizing substances for the first time
legalizing drugs in the united states
monitoring the transportation of drugs

Explanation:

The text clearly states that in 1970, the Comprehensive Drug Abuse Prevention and Control Act was passed and it began the process of categorizing substances for the first time. The other options (legalizing drugs and monitoring drug transportation) are not mentioned in the provided text as what this act began.

Answer:

categorizing substances for the first time