I believe it would be the Jim crow law
The jim crow law is a set of regulations that is aimed to racially segregate the infrastructure that can be used by black and white citizens after the reconstruction.
The laws prohibit blacks citizens to use the same schools, public transportation, restaurants, or hospital as the white citizens.
Since the infrastructures that can be used by black citizens typically lower in quality, it really limited the chance that black people have to advance and prosper in the society.
The answer you’re looking for is C
The most common method of communication in ancient Asia is sending a messenger on a horse. There are transfer stations for horses throughout the continent that allows the messenger to switch to a new horse after covering some distance. Water transportation is also used for communication. In China during an invasion from the North, soldiers on the towers of the Great Wall of China would light up a torch and all the other towers would do that as well until it reaches the capital.
In the Soviet Union, propaganda was used extensively in order to spread the dominant Marxist-Leninist ideology and to promote support for the Communist Party. During the government of Stalin, it became present everywhere, including in the social and natural sciences taught at school.
All published items were not only subject to censorship if they contained undesirable information, but they were also edited to promote particular views. The figure of Stalin was greatly idealized. He was presented as a benevolent, protective father figure and a hero of the Revolution.
Any deviation from ideology could be punished by execution and labor camps, as well as punitive psychiatry and loss of citizenship.
