Question

which of these is one of the two biggest reasons for the nations widening income inequality?
○ differences in education level
○ a decline in union membership
○ an increase in service-sector jobs
○ discrimination against women and minorities

Explanation:

Differences in education level are widely recognized as a major driver of income inequality. Higher education is strongly correlated with higher earnings, and the wage gap between college graduates and those with lower education has expanded over time, making it one of the two biggest reasons for widening income inequality.

Answer:

differences in education level