SOMEONE PLEASE HELP ME What explains the connection between the increase in power of the corrupt city political machines and the increasing numbers of immigrants during the late 1800s?

Select one:
a. The increase in immigration had very little economic, social, or political significance.
b. The large numbers of immigrants filling the cities in the late 1800's were given services and assistance by the political machines in exchange for votes.
c. Immigrants were usually elected to the highest political positions at the local and state level.
d. During the late 1800's very few immigrants arrived in cities, which allowed for the party bosses to keep power in local politics.