Which statement is evidence used to support the endosymbiotic theory?

Mitochondria and chloroplasts contain their own DNA.

Mitochondria and chloroplasts are surrounded by one membrane.

Mitochondria and chloroplasts reproduce similar to eukaryotic cells: through mitosis.

Mitochondria and chloroplasts contain their own DNA.

The statement that provides evidence to support the endosymbiotic theory is: "Mitochondria and chloroplasts contain their own DNA."