A Compound $\mathrm{C}_{7} \mathrm{H}_{13} \mathrm{Cl}$ , Is Reacted with Sodium Ethoxide and Gives a Single

A compound, $\mathrm{C}_{7} \mathrm{H}_{13} \mathrm{Cl}$ , is reacted with sodium ethoxide and gives a single elimination product, $\mathrm{C}_{7} \mathrm{H}_{12}$ . Treatment with ozone followed by zinc and water gives the compound below. Identify the original compound.

A) 2-chloro-1,1-dimethylcyclopentane
B) 1-chloro-1,2-dimethylcyclopentane
C) 4-chloro-1,2-dimethylcyclopentane
D) 2-chloro-1,3-dimethylcyclopentane