dentify the factors that contributed to the shrinking size of the American middle class after the early 1970s. Contributing Factor(s) Drag appropriate answer(s) here greater demand for higher-skill jobs Press Space to open an expanding income gap between the highest paid executives and employees in the middle ranks Press Space to open the emergence of the low-wage service sector Press Space to open a more regressive federal income tax Press Space to open Not Contributing Factor(s) Drag appropriate answer(s) here