When aqueous silver nitrate is mixed with aqueous barium chloride, a white precipitate forms, and this dissolves in excess dilute aqueous ammonia to give a colourless solution. If excess dilute nitric acid is then added to the colourless solution, a white precipitate, Z, is formed. What is Z?
- A$\text{AgCl}$
- B$\text{BaCl}_2$
- C$\text{Ba(NO}_3)_2$
- D$\text{NH}_4\text{NO}_3$