Predict the correct product when $Cl_2$ is passed through a $H^{18}O-^{18}OH$ solution.

• A
  $H^{+} + Cl^{-} + ^{18}O_2$ (both oxygen atoms are $^{18}O$)
• B
  $HO^{18}Cl$ and $HCl^{18}O_2$ (all oxygen atoms are $^{18}O$)
• C
  $HCl^{18}O_4$ and $HCl$ (all oxygen atoms are $^{18}O$)
• D
  $Cl_2^{18}O$ and $H_2^{18}O$ (all oxygen atoms are $^{18}O$)