During the Calvin-Benson Cycle (Carbon-Fixing Reactions), in the Red Columbine

Multiple Choice

During the Calvin-Benson cycle (carbon-fixing reactions) , in the red Columbine plant, high-energy electrons are transferred into a newly made 3-carbon compound. Eventually these electrons will end up as part of glucose molecules. What was the original source of these electrons in photosynthesis?

A) glucose
B) ATP
C) oxygen
D) water
E) carbon dioxide