If Many Human Genes Differ in About 10% of Their

Multiple Choice

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,approximately how many years have passed since the two species diverged?

A) 5 million
B) 3 million
C) 10 million
D) 20 million
E) 200 million