Answer:
a. identification with the drug culture
Step-by-step explanation:
David's likes and preferences such as marijuana leaf symbol on his clothes, collection of beer cans and jokes about drug indicate his mind's working. He thinks and talks about drug or alcohol. More importantly, David's anger over his parents trying to talk about drug shows there is some truth. All the activities of David including the room in anger shows he does not like to talk about drug or alcohol, a normal tendency among youth to hide such habits in the beginning. David identifies himself with drug culture due to his cloths, his likes, and his behavior.