Aliya Saperstein and Andrew Penner used longitudinal survey data that followed 12,000 Americans for nineteen years, beginning when they were teenagers. Which of the following did they find?

A. Interviewers were more likely to see someone as black when the respondents' situations fit the stereotype of black people.
B. People who were initially classified as multiracial on the Census drifted toward a single category by the end of the nineteen year period.
C. One in five people "changed races."
D. Unemployed respondents were more likely to be classified as white.