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aencabo
I think it's letter B. When an object freezes, such as ice, their molecules will be contracted due to the molecules that looses kinetic energy. When there is a lose of kinetic energy, then the temperature is cold. So the answer is contraction because it causes the molecules to freeze.
mcbite21

  Litmus-type test strips are used to test coolant for freeze protection and  

  A. density.

  B. contraction.

  C. expansion.

  D. condition.

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