According to the Information Presented in the Critical Thinking Box

According to the information presented in the Critical Thinking box on smoking and psychological disorders:

A) researchers are exploring the use of nicotine gum and patches as an alternative to antidepressant medications for people with major depressive disorder or persistent depressive disorder.
B) people with multiple psychological disorders have higher rates of smoking and smoke more cigarettes per day than people with one or no psychological disorders.
C) people who smoke a pack of cigarettes per day or more seem to develop a brain "buffer" that reduces the chances of major depressive disorder occurring or recurring.
D) people diagnosed with schizophrenia or another mental illness were four times less likely to smoke than the general population.