If Plant Gene Alterations Cause the Plants to Be Deficient

If plant gene alterations cause the plants to be deficient in photorespiration, what would most probably occur?

A) Photosynthetic efficiency would be reduced at low light intensities.
B) Cells would carry on the Calvin cycle at a much slower rate.
C) Less ATP would be generated.
D) There would be more light-induced damage to the cells.
E) Less oxygen would be produced.