$A$ solution containing $0.01 \ M \ Zn^{2+}$ and $0.01 \ M \ Cu^{2+}$ is saturated with $H_2S$ gas. The concentration of $S^{2-}$ is $8.1 \times 10^{-21} \ M$. Given that the $K_{sp}$ values for $ZnS$ and $CuS$ are $3.0 \times 10^{-22}$ and $8.0 \times 10^{-36}$ respectively,which of the following will occur in the solution?

• A
  $ZnS$ will precipitate.
• B
  $CuS$ will precipitate.
• C
  Both $ZnS$ and $CuS$ will precipitate.
• D
  Both $Zn^{2+}$ and $Cu^{2+}$ will remain in the solution.