Choose the correct statement from the following statements on "balanced equation".

• A. In a balanced equation, if the reactants are in the gaseous state, the products are in the same state.
• B. In a balanced equation, the number of gaseous reactants is equal to the number of gaseous products.
• C. In a balanced equation, the kinds and numbers of atoms are the same on both sides of the chemical equation.
• D. A balanced equation always uses the double-headed arrow.

Answer: (C)