The outcomes of two tests carried out on solution $X$ are shown below. Aqueous sodium hydroxide: a white precipitate is formed, and the precipitate dissolves in excess. Aqueous ammonia: a white precipitate is formed, and the precipitate does not dissolve. Which ion is present in solution $X$?
- A$\text{Al}^{3+}$
- B$\text{Ca}^{2+}$
- C$\text{Cu}^{2+}$
- D$\text{Zn}^{2+}$