Identify the product D in the following sequence of reactions :
`H_(3)C-CH_(2)-CH_(2)-Cl underset(Delta)overset("Alc. KOH")rarrB overset(HBr)rarr Cunderset("Ether")overset("Na")rarrD`
A. 2, 2-Dimethylbutane
B. 2, 3-Dimethylbutane
C. Hexane
D. 2, 4-Dimethylpentane