Which one of these statements explains why aluminium trifluoride is insoluble in anhydrous HF but dissolves on addition of NaF and precipitates out when gaseous BF₃ is bubbled through?

Options

1. AAluminium trifluoride reacts with NaF to form a soluble complex ion, allowing it to dissolve. The addition of
2. BThe addition of NaF to aluminium trifluoride results in the formation of a complex ion that enhances its solub
3. CAluminium trifluoride is insoluble in HF due to its strong ionic lattice. The addition of NaF provides F⁻ ions
4. DThe addition of NaF to aluminium trifluoride forms a soluble complex ion. Bubbling gaseous BF₃ through the sol