A) For [EDTA]^4- determine the maximum number of coordination sites that the ligand can occupy on a single metal ion.
B) For [EDTA]^4-, determine the number and type of donor atoms in the ligand. Options include: a) 4 N and 2 O, b) 2 N and 2 O, c) 4 N and 4 O, d) 2 N and 4 O