The solubility of alkali metal fluorides increases down the group. Select the correct explanation for the given statement.

• A
  Hydration energy increases and lattice energy decreases down the group.
• B
  Both energies decrease down the group,but the decrease in hydration energy is more rapid.
• C
  Both energies decrease down the group,but the decrease in lattice energy is more rapid.
• D
  Both energies increase down the group,but the increase in hydration energy is more rapid.