Which combination best describes the substitution reaction between bromoethane and dilute aqueous sodium hydroxide?

\[{\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{Br}} + {\text{O}}{{\text{H}}^ - } \to {\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{OH}} + {\text{B}}{{\text{r}}^ - }\]

B