The two statements from the article that directly support the author's claim are:
A. "And health treatments that don't take the variations of genetically diverse populations into account can cause problems."
C. "'If we don't include ethnically diverse populations, we are potentially going to be exacerbating health inequalities,' said Sarah Tishkoff, study coauthor and a human geneticist at the University of Pennsylvania."
These statements highlight the consequences of a lack of genetic diversity in research and the potential negative impacts on health treatments and health inequalities.