A student performed a two-stage synthesis where $\text{CH}_3\text{CH}_2\text{CH}_2\text{Br}$ was changed into $\text{CH}_3\text{CH}_2\text{CH}_2\text{CO}_2\text{H}$. Which compound may have been produced in the first stage of this synthesis?
- A$\text{CH}_3\text{CH}_2\text{CH}_2\text{OH}$
- B$\text{CH}_3\text{CH}_2\text{CH}_2\text{CHO}$
- C$\text{CH}_3\text{CH}_2\text{CN}$
- D$\text{CH}_3\text{CH}_2\text{CH}_2\text{CN}$