Photosynthesis can be modeled by its overall chemical reaction. Which two substances are the products, or outputs, of this reaction? A. sugars and carbon dioxide B. carbon dioxide and water C. carbon dioxide and oxygen D. sugars and oxygen

Sugar and oxygen.

Explanation:

Sugar is the main product of Calvin cycle while oxygen is the by product of the process.

The sugar is obtained as 6-C compounds by reduction of Cabondioxide with Hydrogen  ions obtained from the photolysis  of water, in the light dependent stage. Thus the  production Sugar takes place in the light -independent state.

The Oxygen is  produced during photolysis splitting of water to H+ + e- +  O- at  the  light dependent  stage. This is the basic reaction of Light dependent stage.

The Hyrogen is used for CO2 as mentioned above , while the O2  liberated for cellular respiration as by product.