How did the growing wave of immigration affect the rise of political machines? political bosses gave little to newly arrived immigrants because they could not vote. political bosses were often nativists who encouraged restrictions on immigration. political bosses forced immigrants to leave their wards to protect neighborhood jobs. political bosses expanded their power by immigrants in return for their loyalty.

The answer is: Political bosses expanded their power by helping immigrants in return for their loyalty.

At that time, many of the political bosses realized that if they somehow can help the immigrants obtain their citizenship, the immigrants will become much more likely to return their favor.

This mean that they can influence the immigrants to vote for them during the election in exchange for the citizenship. This help the political bosses expanded their power.

answer; /// i believe that the correct answer is (divison of labor);