Even though anabolic steroids do not cause the same high as other drugs, they can lead to addiction. Studies have shown that animals will self-administer steroids when they have the chance, just as they do with other addictive drugs. People may continue to abuse steroids despite physical problems, high costs to buy the drugs, and negative effects on their relationships. These behaviors reflect steroids' addictive potential. Research has further found that some steroid users turn to other drugs, such as opioids, to reduce sleep problems and irritability caused by steroids. – "Anabolic Steroids,”

National Institute on Drug Abuse

Nina knows that it is a myth to think steroids are not addictive. What evidence can Nina use from the passage to confirm the effects of steroid addiction?

People may continue to abuse steroids despite negative side effects.
The addictive nature of steroids goes away after sustaining a physical injury.
Steroid addiction will improve the social interaction between individuals.
Mood swings and sleeping patterns due to steroid use will eventually balance out.