Shari just got her first tattoo at 17 years of age. Her mother is furious with her and cannot understand why she got this tattoo. Dynamic systems theory would explain Shari's behavior as. . .
A. Genetically wired teenage rebellion.
B. Arising from immature frontal brain regions.
C. Occurring because her peers bullied her to get one.
D. Arising from both Shari's own desires and the influence of her peers, many of whom also have tattoos.