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

Both cells require external energy to drive non-spontaneous reactions.

An electrolytic cell generates energy from spontaneous reactions, while a galvanic cell requires external energy.

An electrolytic cell requires external energy to drive non-spontaneous reactions, while a galvanic cell generates energy from spontaneous reactions.

Both cells generate energy from spontaneous reactions.