You are presented with the question "The bonds of that which when heavy is Deuterium cause what to expand when it freezes?" and the following answer choices: 
- matter
 - rings
 - CO 2
 - liquids
 - gas
 - solutes
 - cations
 - water

Now knowing that hydrogen bonds cause water to expand when it freezes and deuterium, or heavy hydrogen, is an isotope of hydrogen, or a hydrogen atom with a neutron added, choose the best answer.


 

        water 