How does a balanced chemical equation demonstrate the Law of Conservation of Mass?

Question

(1 point)
a it shows that all compounds remain bonded after the reaction
b it shows that the properties of the elements stay the same after the reaction
c it shows that no atoms have been gained or lost during the reaction
d it shows that only physical changes follow the Law of Conservation of Mass

Answer 1

c it shows that no atoms have been gained or lost during the reaction.