Education levels, employment levels, and income levels provide information on the status of different groups because: - a. education levels affect whether and where people are employed, their income levels, and their opportunities for and actual advancement. b. some differences in employment levels between groups are not completely explained by differences in education levels. C. comparisons may be made between racial and ethnic groups and between men and women to determine the education to income relationship for each group. d. education levels have a limited effect on people's employment and income levels. e. A, B, and C above.