Riding a skateboard is a phrase
A phrase can not have verb and subject together. riding a skateboard doesn't have subject. the others are clause.they have both subject and verb.
good luck.
The concept that Abraham is demonstrating is Code switching. Code switching involves adjusting one's style of speech, appearance, behavior, or expression in ways that will optimize the comfort of others in exchange for fair treatment, quality service, and employment opportunities.
Simply put, code switching when someone changes their language based on who they are with, typically to fit in better with a different group.
From research, I believe the answer is C. I hope this helps!