Answer:
C . Ritalin
Explanation:
Ritalin with other types of stimulants causes overactive eye movement. Ritalin belongs to a group of stimulants called Methylphenidate not only this but others such as cocaine,nicotine etc
Answer:
Multiple Sclerosis
Explanation:
Multiple Sclerosis is a potentially disabling disease of the brain and spinal cord (central nervous system).
The only guaranteed method is abstinence