Question

which of the following is a street name for opioids?
fentanyl
oxycodone
happy pills
sleeping pills

Explanation:

Fentanyl and oxycodone are scientific names of opioids. "Happy pills" can sometimes be a street - name for opioids or other drugs in an informal, non - scientific context. "Sleeping pills" generally refer to medications like benzodiazepines for sleep and are not street names for opioids.

Answer:

C. Happy pills