Question

which of the following is classified as an opioid? methamphetamine ecstasy morphine ritalin

Explanation:

Opioids are substances that act on opioid receptors to produce morphine - like effects. Morphine is a well - known opioid. Methamphetamine is a stimulant, Ecstasy is a hallucinogenic amphetamine, and Ritalin is a stimulant used to treat ADHD.

Answer:

C. Morphine