The hydrolysis of tertiary bromoalkanes with a warm dilute aqueous sodium hydroxide solution proceeds by a two-step ${{\text{S}}_{\text{N}}}{\text{1}}$ mechanism.

     Step I:     ${\text{R}} - {\text{Br}} \to {{\text{R}}^ + }{\text{B}}{{\text{r}}^ - }$

     Step II:     ${{\text{R}}^ + } + {\text{O}}{{\text{H}}^ - } \to {\text{R}} - {\text{OH}}$

Which description of this reaction is consistent with the above information?

B