Which of the following does NOT occur in the normal process of light-driven production of ATP and NADPH in plant chloroplasts?

A) The cytochrome b₆-f complex pumps protons from the stroma into the thylakoid lumen.
B) The oxygen-evolving enzyme generates protons in the thylakoid lumen.
C) The ferredoxin-NADP⁺ reductase generates protons in the thylakoid lumen.
D) The ATP synthase transports protons from the thylakoid lumen to the stroma.