All of the following statements about treatment of psychological disorders are correct except:​

A) ​There are commercial pressures that favor a bioscience approach to mental disorders.
B) ​Mental health practices in North America are very ethnocentric.
C) ​A reductionist biomedical mindset commonly ignores cultural factors in mental disorders.
D) ​Mental disorders are always caused by a combination of cultural and biological factors.

The statement "Mental disorders are always caused by a combination of cultural and biological factors" is incorrect. While cultural and biological factors can both contribute to the development of mental disorders, not all disorders are caused by a combination of both factors. Some disorders may be primarily biological in nature, while others may be primarily influenced by sociocultural factors. It is important to consider multiple factors in understanding and treating mental disorders.