which of the following alkyl halides give most complex mixure of alkene in an `E_(2)` reaction ?
A. `CH_(3)-CH_(2)-CH_(2)-Br`
B. `CH_(3)-CH_(2)-CH_(2) -underset(Br)underset(|)Ch -CH_(3)`
C. `CH_(3)-CH_(2)-underset(Br)underset(|)Ch-CH_(2)-CH_(3)`
D. `CH_(3)-underset(Br)underset(|)overset(CH_(3))overset(|)C-CH_(2)-CH_(3)`