According to the Critical Thinking Box on Smoking and Psychological

According to the Critical Thinking box on smoking and psychological disorders, which of the following is FALSE?

A) Several studies focusing on adolescents found that cigarette smoking predicted the onset of depressive symptoms.
B) A positive association was found between smoking and the severity of symptoms experienced by people with anxiety disorders.
C) In a study of people with schizophrenia, 90 percent of the patients had started smoking before their illness began.
D) People who smoke have nearly twice the risk of later developing major depressive disorder.