At $25 \, ^\circ C$,the $K_{sp}$ of $CaF_2$ is $1.7 \times 10^{-10}$. Which of the following combinations will result in the precipitation of $CaF_2$?

• A
  $1 \times 10^{-2} \, M \, Ca^{2+}$ and $1 \times 10^{-5} \, M \, F^{-}$
• B
  $1 \times 10^{-4} \, M \, Ca^{2+}$ and $1 \times 10^{-4} \, M \, F^{-}$
• C
  $1 \times 10^{-3} \, M \, Ca^{2+}$ and $1 \times 10^{-5} \, M \, F^{-}$
• D
  $1 \times 10^{-2} \, M \, Ca^{2+}$ and $1 \times 10^{-3} \, M \, F^{-}$