the reactants are\na the substances present when the reactions begins.\nb the substances present when the…

the reactants are\na the substances present when the reactions begins.\nb the substances present when the reaction is complete.\nc the properties that change after the reaction.\nd the energy that is released or stored during the reaction.

the reactants are\na the substances present when the reactions begins.\nb the substances present when the reaction is complete.\nc the properties that change after the reaction.\nd the energy that is released or stored during the reaction.

Answer

Brief Explanations:

Los reactantes son las sustancias presentes al inicio de una reacción química.

Answer:

A. the substances present when the reactions begins.