two substances did not react with each other as expected. what is the most likely reason?\no it was…

two substances did not react with each other as expected. what is the most likely reason?\no it was heated.\no it was hit with a hammer.\no it was placed in a salt solution.\no it was frozen.
Answer
Brief Explanations:
Reaction rates are affected by temperature. Freezing substances lowers their temperature, reducing the kinetic energy of particles and decreasing the likelihood of effective collisions, thus inhibiting the reaction. Heating usually speeds up reactions, hitting with a hammer and placing in a salt - solution are not typical reasons for non - reaction as described here.
Answer:
It was frozen.