quizlet at some point, japanese, chinese, indian, and mexican were all listed as their own races on the u.s. census. this change in racial categorization over time shows how: a. race is based on biological markers which overtime are interpreted differently. b. the definitions of race and ethnicity are often conflated on the u.s. census. c. racial categorization is a social construction of difference. d. the u.s. has developed a deeper understanding of the biological markers of race