Which of the following statements are correct? Explain your answers.

A. After an electron has been removed by light, the positively charged chlorophyll  the reaction center of the first  (photosystem II) has a greater affinity for electrons than O₂ has.

B. Photosynthesis is the light-driven transfer of an electron from chlorophyll to a  molecule that normally has a much lower affinity for electrons.

C. Because it requires the removal of four electrons to release one O₂ molecule from two H₂O molecules, the water-splitting enzyme in photosystem II has to keep the reaction intermediates tightly bound so as to prevent partly reduced, and therefore hazardous, superoxide radicals from escaping.