If Many Human Genes Differ in About 10% of Their

If many human genes differ in about 10% of their bases from another species' same genes and substitutions occur at an estimated rate of 2% per one million years then

A) approximately 5 million years have passed since the two species diverged.
B) approximately 3 million years have passed since the two species diverged.
C) approximately 10 million years have passed since the two species diverged.
D) approximately 20 million years have passed since the two species divergeD.
E) approximately 200,000 years have passed since the two species diverged.