Which of the Following Best Represents the Involvement of Epigenetics $\rightarrow$

Which of the following best represents the involvement of epigenetics in the progression to addiction?

A) Environmental stimuli $\rightarrow$ acute drug exposure $\rightarrow$ repeated drug exposure/addiction $\rightarrow$ modified gene expression $\rightarrow$ epigenetic changes
B) Environmental stimuli $\rightarrow$ acute drug exposure $\rightarrow$ epigenetic changes $\rightarrow$ modified gene expression $\rightarrow$ repeated drug exposure/addiction
C) Environmental stimuli $\rightarrow$ modified gene expression $\rightarrow$ acute drug exposure $\rightarrow$ repeated drug exposure/addiction $\rightarrow$ epigenetic changes
D) Acute drug exposure $\rightarrow$ environmental stimuli $\rightarrow$ modified gene expression $\rightarrow$ epigenetic changes $\rightarrow$ repeated drug exposure/addiction