Answer:
C
Step-by-step explanation:
I would say C because the Law of Conservation of Matter states that matter cannot be created or destroyed. A and D say no, but matter was not destroyed or created in this picture. B is close because its saying it shows atoms being combined but it doesn't say which atoms. Therefore I'd say C, the same types of atoms are involved because its saying that matter was not created or destroyed, its the same atoms in the starting materials and the product change.