To solve such this we must know the concept of chemical reaction. Therefore the correct option is option C that is the properties and identity of the reacting substances.
<h3>
What is chemical reaction? </h3>
Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
A change in the properties and identity of the reacting substances means that a chemical reaction has occurred.
Therefore the correct option is option C.
Learn more about the chemical reactions, here:
brainly.com/question/3461108
#SPJ1
