Which of the Following Best Describes the Classification of Medicinal

Which of the following best describes the classification of medicinal substance use?

A) trying a substance once or perhaps a few times out of curiosity and then not using it again
B) using a substance during social activities with one or more friends
C) using a substance to relieve an unpleasant emotional state such as sadness, anxiety, stress, or loneliness
D) becoming dependent on regular use of the substance to feel good physically or psychologically