Eating disorders are frequently accompanied by existing psychiatric and physical illness, including anxiety, obsessive behavior, depression, and
a. substance abuse
b. stroke
c. hemorrhaging
d. risk taking

The answer is letter A.

There are some people who take illegal substances in the body as a result of an underlying insecurity or lack of emotional support. Some narcotic drugs out there are meant to suppress appetite which then causes people who are dependent on them to develop eating disorders. Stimulants like amphetamines cause an excessive change in behavior and eating habits which would result eventually to eating disorders. People who are known to have a substance abuse problem must always seek the help of professionals in order to resolve and regress past issues.