Which of the following statements about social stratification based upon race and ethnicity is true? Stratification based upon race and ethnicity is highly pervasive and affects all aspects of political, economic, and social life. Evaluating someone's race or ethnicity is an accurate way to guess their position in society. Race and ethnicity may have been a means of stratification in the past, but they are no longer relevant today. Race and ethnicity are not organizing principles for social stratification.