Which of the Following Best Describes the Classification of Experimental

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

A) trying a substance once or perhaps a few times out of curiosity and then not using it again
B) the use of 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) when a person has become dependent on regular use of the substance to feel good physically or psychologically