In the prior version of the DSM (the DSM-IV), which of the following was considered the less severe disorder?

Name: In the prior version of the DSM (the DSM-IV), which of the following was considered the less severe disorder?
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In the DSM-IV, substance abuse was seen as the less severe disorder compared to substance dependence. This has since been revised in the DSM-5, where substance abuse and substance dependence have been combined into one disorder called "substance use disorder."

In the Prior Version of the DSM (The DSM-IV), Which