The Following Reaction in Aqueous Solution Was Found to Be $\rarr$

The following reaction in aqueous solution was found to be first order in [OH^-], first order in [C₂H₅Br], and inverse first order in Br^-.
C₂H₅Br + OH^- $\rarr$ C₂H₅OH + Br^-
Which one of the following mechanisms is consistent with the observed reaction order?

A) C₂H₅Br $\rarr$ C₂H₅⁺ + Br^{- -} fast C₂H₅⁺ + OH^- $\rarr$ C₂H₅OH slow
B) C₂H₅Br +H₂O $\rarr$ C₂H₅OH + H⁺ + Br^- slow H⁺ + OH^- $\rarr$ H₂O fast
C) C₂H₅Br $\rarr$ C₂H₅⁺ + Br^- slow C₂H₅⁺ + OH^- $\rarr$ C₂H₅OH fast
D) C₂H₅Br $\rarr$ C₂H₅⁺ + Br^- slow OH^- + Br^- $\rarr$ HOBr fast
HOBr + C₂H₅⁺ $\rarr$ C₂H₅OH + Br^- fast