Which of the following correctly describes the primary difference between an electrolytic cell and a galvanic cell?

• A. Both cells require external energy to drive non-spontaneous reactions.
• B. An electrolytic cell generates energy from spontaneous reactions, while a galvanic cell requires external energy.
• C. An electrolytic cell requires external energy to drive non-spontaneous reactions, while a galvanic cell generates energy from spontaneous reactions.
• D. Both cells generate energy from spontaneous reactions.

Answer: (C)