Answer:
The answer could be B. Social but the correct answer is C. Medicinal.
Step-by-step explanation:
Medicinal substance use happens when individuals use certain substances such as marijuana, alcohol and other psychotropics to alleviate certain physical or psychological symptoms. Thus, the goal of consuming the drug is not entertainment, but relief.
In this particular case, Gil feels anxious and depressed a lot, he also dreads the thought of having to speak in front of others at school and feels nervous around people. He uses marihuana and alcohol to alleviate those psychological symptoms which means that Gil's substance use is medicinal.