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. Given these facts, the bonds of that which when heavy is Deuterium cause what to expand when it freezes among the following options:
- matter
 - rings
 - CO 2
 - liquids
 - gas
 - solutes
 - cations
 - water


 

        water 