The Following Is Correct with Respect to Anaerobic Photosystem I

The following is correct with respect to anaerobic photosystem I:

A) PS I separates electrons associated with hydrogens from H₂S.
B) PS I separates electrons from organic electron donors such as succinate.
C) PS I separates electrons from Fe²⁺.
D) All of the above.
E) None of the above.