In designing an experiment that would support endosymbiotic theory, which of the following would provide the best evidence?

A. Comparing mitochondrial DNA between different eukaryotes to see how closely they are related

B. Comparing mitochondrial DNA to the DNA of chloroplasts to identify similar lines of ancestry

C. Comparing mitochondrial DNA to the DNA of the host cell to look for gene transfers

D. Comparing mitochondrial DNA among members of the same family to predict mutations