​Why Is Photorespiration an Inefficient Way to Produce Sugars

Multiple Choice

​Why is photorespiration an inefficient way to produce sugars?

A) ​Photorespiration produces 7-carbon carbohydrate molecules instead of 6-carbon sugars.
B) ​The increased production of O₂ during photorespiration generates excess dangerous free radicals.
C) ​Photorespiration only occurs during the night, when the light-dependent reactions are inactive.
D) ​CO₂ is lost instead of being fixed and ATP is required to detoxify the ammonia that is produced.
E) ​Carbon fixation requires an extra turn of the Calvin-Benson cycle for each molecule of sugar produced.