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

a. middle class.
b. working poor.
c. wealthy class.
d. working rich.

I believe the answer is: working poor

Working poor refers to the group of people who are in poverty level due to lack of work hours/opportunity. The majority of immigrants came to American cities to gamble their opportunities and hope that they managed to get job in recently established manufacture companies. Only some of them able to got the jobs.

the passage of a strict fugitive slave law

your answer is going to be wyoming.

hope this !