Answer :
The majority of immigrants and rural migrants who moved to American cities at the turn of the twentieth century became part of the working poor. Therefore, b is the correct option.
Who are migrants?
Migrants are people who migrate from their place of origin to their place of destination. People migrate mainly for a few purposes, such as to get a better education or to get better employment opportunities and so on.
The place of origin faces a lack of population, especially the working population due to migration. Whereas the place of destination faces population pressure due to a huge influx of people.
Thus, at the beginning of the 20th century, the bulk of immigrants and rural migrants who relocated to American cities joined the working poor. As a result, choice b is the right one.
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