Which pair of chemical compounds could be used to make the fertiliser shown?
- A$(\text{NH}_4)_3\text{PO}_4, \text{KCl}$
- B$\text{NH}_4\text{NO}_3, \text{Ca}_3(\text{PO}_4)_2$
- C$\text{NH}_4\text{NO}_3, \text{CO}(\text{NH}_2)_2$
- D$\text{NH}_4\text{NO}_3, \text{K}_2\text{SO}_4, (\text{NH}_4)_2\text{SO}_4$