The majority of immigrants and rural migrants who moved to american cities at the turn of the twentieth century became part of the

b. working poor.

Explanation:

According to another source, these are the options that are included with this question:

a. middle class.

b. working poor.

c. wealthy class.

d. working rich.

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. The working poor are a class of people who are below the poverty line despite the fact that they are employed. This was common at the time due to the terrible working conditions, lack of safety net and low wages that many people faced in cities. In many parts of the country, this continues to be a common problem for working people.