What role did racism play in immigration policy and procedures during the late 1800s and early 1900s?

The correct answer to this open question is the following.

Although there are no options attached, we can say the following.

The role that racism played in immigration policy and procedures during the late 1800s and early 1900s was key in the creation of laws and legislation that limited the entrance of new immigrants to the United States.

For instance, we have the case of the Chinese Exclusion Act of May 6, 1882. that was created to prohibit the immigration of Chinese people that wanted to enter the United States to find work opportunities to improve the living conditions of their families.

It was a time in the United States where American white people thought that these immigrants just came to take what they deserved, that those jobs were theirs, that America was their country and did not belong to anyone; white Americans did not like the idea to mingle with foreigners and rejected foreign culture, language, and traditions.

the underground railroad (apocope of the metropolitan railroad) is a system of urban trains located within a city and its metropolitan area. it is characterized for being a massive transport of passengers in the big cities, uniting diverse zones and their environs, with high capacity and frequency and in segregated form to other systems of transport. metropolitan railroads are built underground or on the surface, although most systems use mixed models where sections are combined in both modalities.

1 - as a result, the metro tends to reduce car travel for two reasons: first, due to the greater transfer of users from the car and, second, due to the reduction in the acquisition of cars in homes located in sectors near the stations of the metro.

2 -the metro allows to contribute effectively to the achievement of all the objectives of an urban development policy: it improves the efficiency of the city's economy by reducing travel costs and also generates a higher level of activities in the city center, taking advantage of of the agglomeration economies.

3 -it is a clean means of transport, since it uses renewable energy (usually electricity), taking care of the environment and avoiding excessive pollution.