What group in the 1920s would have thought the earlier Chinese
Exclusion Act was a good idea?

The Chinese Exclusion Act of 1882 was the first significant law restricting immigration ... of the mid-nineteenth century between Great Britain and China left China in debt. ... By 1870, Chinese miners had paid $5 million to the state of ... Shun, though it would take decades for the immigration ban to be lifted.

Explanation:

option b, all states follow similar rules and legal process is the right answer.

the 14th amendment in the constitution of america was enacted in july 1868, which include the citizenship, due process, and the equal protection under the law. this amendment was a response to the issues related to former slaves following the american civil war.

the citizenship clause granted citizenship to all persons born or naturalized in the u.s,.   due process of clause asserted that states may not deny any person "life, liberty or property, without due process of law and the equal protection clause declared that a state may not deny to any person within its jurisdiction the equal protection of the laws. the above mentioned excerpt from the constitution of the united states, ensures the citizenship,due process, and equal protection under the law.