Final answer:
The false statement is option A. The ICD is used more for clinical diagnosis compared to the DSM.
Step-by-step explanation:
The false statement about classification systems is:
A. The ICD is used more for clinical diagnosis compared to the DSM.
In reality, the opposite is true. The Diagnostic and Statistical Manual of Mental Disorders (DSM) is more commonly used by mental health professionals in the United States for diagnosing mental disorders, while the International Classification of Diseases (ICD) is used worldwide for clinical diagnosis and classification of diseases.