Credibility of the source is checking the degree of authenticity of a source
(You want to know how reliable is this information?)
There are multiple factors that can help to check its credibility:
Is the author of the source trusted?
Is the background of the source safe?
Is it a primary or secondary source?
Have the source become unaccurate or
obsolete due to time?
Is there any motive or signs that the source is biased?
The Great Plains were one. They hunted elk, bison, antelope, and etc..
The answer is "States now forbid operators of theaters, hotels, and restaurants to minority groups." They still have the right to refuse services to anyone they choose.
How did social structure contribute to discontent in Latin America? The social structure permitted peninsulares to dominate the political and social life, the creoles resented their 2nd-class status, and mestizos and mulattoes were enrages that they were denied the status, wealth, and power that the whites had.
In general, a major result of more farms becoming mechanized was that "farm workers became rural entrepreneurs, although it should be noted that this was not universal.