How did immigration affect America in the 20th
century?

The Immigartion affected America by

Explanation:

The available evidence suggests that immigration leads to more innovation, a better educated workforce, greater occupational specialization, better matching of skills with jobs, and higher overall economic productivity. Immigration also has a net positive effect on combined federal, state, and local budgets

Note:

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answer; unimodal and symmetrical;

answer; c.wright mills;