Paulinella chromatophora acquired its chloroplast independently from all other photosynthetic eukaryotes. Which of the following would provide the BEST evidence that this independent acquisition occurred MORE RECENTLY than in all other groups?

a) the chloroplast in Paulinella has a much smaller genome than those of other eukaryote chloroplasts
b) the chloroplast in Paulinella uses the same chemical reactions to do photosynthesis as in other eukaryote chloroplasts
c) the chloroplast in all other groups contains different genes than the mitochondria in Paulinella
d) the chloroplast in Paulinella has a much larger genome than those of other eukaryote chloroplasts