The answer would be C
The spoils system is when a political party, after winning an election, gives jobs to its supporters.
https://www.britannica.com/topic/spoils-system
Actually, yes, it happens everywhere. most of the time some people believe in their own beliefs and get too hard headed and shallow to even process that not everyone has the same beliefs/practices that doesn't mean they're right nor wrong just different. like Atheism & Christianity; its a huge topic people discuss that usually always turns heated.
I would say the Jim Crow laws
Polytheism is the answer.