Question

question 1-42
fentanyl, the synthetic opioid sold illegally on the street that is mixed with heroin or other drugs, poses an extremely high risk of overdose because
of its greater toxicity; an extremely small dose can be lethal.
overdoses can occur more suddenly, narrowing the window for intervention.
it may be undetectable when mixed with heroin or pressed into pills.
all of the above

Explanation:

All listed statements about fentanyl are accurate: it has extreme toxicity where tiny doses are lethal, overdoses happen rapidly leaving little intervention time, and it can be hidden in other drugs/pills without detection.

Answer:

All of the above