A nurse is providing teaching to a client with opioid use disorder who is prescribed naltrexone. Which client statement demonstrates an accurate understanding of how naltrexone works?

"This medication blocks opioid receptors so opioids cannot produce a euphoric effect."

"This medication increases serotonin levels to improve mood and decrease drug use."

"This medication replaces opioids in my body to prevent cravings."

"This medication reduces withdrawal symptoms by partially activating opioid receptors."