In the late 1800s, workers received low wages because

a) their work ethic was low compared to other developed countries

b) the sit down strikes were not as effective as boycotts

c) they could easily be replaced with other workers

d) immigration levels were low in the united states

In the late 1800s, workers organized unions to solve their problems. Their problems were low wages and unsafe working conditions. ... These unions used strikes to try to force employers to increase wages or make working conditions safer. Some unions worked on getting new laws passed. SO BASICALLY A

Explanation:

C) They could easily be replaced with other workers.

Industrialization caused for a rapid increase of population, thus many people were looking for jobs despite having low wages.

the answer is d. selective incorporation. (apex)