Photosynthesis Must Provide a Source of Electrons and H⁺because ____

Photosynthesis must provide a source of electrons and H⁺because ____.

A) atmospheric CO₂ must be oxidized by adding electrons
B) CO₂must be reduced to produce sugars
C) hydrogen atoms are added to oxygen to form water
D) hydrogen ions and electrons react to produce hydrogen gas
E) hydrogen ions and electrons are converted into oxygen gas