Answer: Option (C) is the correct answer.
Step-by-step explanation:
Stoichiometric coefficients represents the number of individual atoms involved in the chemical equation.
As a result, stoichiometric coefficients help in balancing the equation because an equation can only become balanced when number of reactant molecules equal the number of product molecules or vice versa.
Therefore, we can conclude that a chemical equation can be used to solve stoichiometry problems provided that it includes the coefficients that are needed for balancing the equation.