Stimulants calm and sooth the brain they don't really effect the respatory system I don't think stimulants help people overcome drug addictions and they probably don't cause cancer and tumors. The best answer is b.
Answer by JKismyhusbandbae: can cause tumors or cancer.
Explanation: Stimulants are drugs that elevate the mood, increase feelings of well-being, and increase energy. They affect the nervous system by increasing its’ activity and can cause cancer.
