Which of the following represent terylene (or dacron)?
A. `(-OCH_2-CH_2O-overset(O)overset(||)C-C_6-H_5-overset(O)overset(||)C-)n`
B. `(-CH_2-CH=CH-CH_2-CH-CH_2-)n`
C. `(-CH_2-underset(Cl)underset(|)(C )=CH-CH_2-underset(Cl)underset(|)(CH)-CH_2-)n`
D. `(-CH_2-underset(C_6H_5)underset(|)(CH)-CH_(2)-underset(C_(6)H_(5))underset(|)(C)H-)n`
