Why do citizens have to register to vote

In order to make elections fair and to ensure there is no fraud, voters need to register so that the vote counters can make sure they only vote once. This process is used at the local, state, and federal levels.

Explanation:

I'm not very familiar with these kind of things but I'm guessing the reason is because there won't be any "fake electors" as in corrupted ballots and yk stuff like that...

c]extended voting rights to african americans

answer: both considered peasants valued members of society.

explanation: the ancient chinese and indian empires were large asian empires that had the same problems with other big empires, they had to work hard and sometimes fight in order to keep them united, they both relied heavily on their capacity to trade and to send strange and rare items to europe, and had the father as the head of the house hold in both societies, but they didn´t considered pleasants as valued members of their society, they were the bottom of the social pyramid in both of their societies.