Butanoic acid may be prepared from $1$-bromopropane in two steps. stage $1$ $\text{CH}_3\text{CH}_2\text{CH}_2\text{Br} \rightarrow \text{CH}_3\text{CH}_2\text{CH}_2\text{CN}$ stage $2$ $\text{CH}_3\text{CH}_2\text{CH}_2\text{CN} \rightarrow \text{CH}_3\text{CH}_2\text{CH}_2\text{CO}_2\text{H}$ What are the reaction types for stage $1$ and stage $2$?
- Astage 1: electrophilic addition, stage 2: hydrolysis
- Bstage 1: electrophilic addition, stage 2: oxidation
- Cstage 1: nucleophilic substitution, stage 2: hydrolysis
- Dstage 1: nucleophilic substitution, stage 2: oxidation