Olivia Was Analyzing 50 Years of Data That Addressed Levels

Olivia was analyzing 50 years of data that addressed levels of educational attainment as related to social class backgrounds. According to the text, which of the following would be her finding?

A) Educational attainment has increased for all social classes over the past half century.
B) Educational attainment had increased for youth from lower-class backgrounds, but levels remained the same for middle- and upper-class individuals.
C) Educational attainment has increased over the past half century, but predominantly in the higher income levels.
D) Educational attainments levels have declined in every social class category