Which Piece of Evidence Best Supports the Endosymbiotic Theory of Organelle

Which piece of evidence best supports the endosymbiotic theory of organelle evolution?

A) Mitochondria and chloroplasts are the same size as bacteria.
B) Mitochondria and chloroplasts divide by binary fission.
C) Mitochondria and chloroplasts both contain DNA and some can make their own proteins.
D) The outer membrane of chloroplasts and mitochondria resembles that of a eukaryotic cell while the inner membrane resembles that of a bacterial cell.
E) All of these are correct.