The rapidly growing diversity of U.S. culture is one of the most important drivers of change in this century. The U.S. Census Bureau projects that by 2018, it won't be possible to place a majority of children younger than the age of 18 into a ________
A. halal age cohort
B. PRIZM family
C. progressive learning model
D. single racial or ethnic group
E. connexity community
Answer: d. single racial or ethnic group