How Would an Anaerobic Environment Affect Photosynthesis

How would an anaerobic environment affect photosynthesis?

A) Photosynthesis would briefly continue using oxygen reserves in mitochondria before stopping.
B) Photosynthesis would continue,assuming there was also sufficient light,water,and carbon dioxide.
C) Photosynthesis would stop because oxygen is needed for carbon dioxide to react with glucose.
D) Photosynthesis would continue because oxygen and carbon dioxide are products and not reactants of photosynthesis.
E) Photosynthesis would stop because oxygen is the key reactant used to generate water from glucose.