In a redox reaction, how is the number of electrons transferred (n) determined from balanced half-reactions?

• A. The number of electrons exchanged in the oxidation-state changes summed across half-reactions.
• B. The total charge difference between products and reactants divided by Faraday's constant.
• C. The sum of stoichiometric coefficients in the balanced equation.
• D. The number of protons transferred in solution.

Answer: (A)