They were still segregated while they were in the U.S military. They even lived on a separate field even though they were fighting the same battles as the others.
This sentence technically doesn't contain an error in verb-noun agreement, however the noun "each one" is odd here. It should be "everyone"
They are more like words and partial sentences. A symbol means an action or event rather then a letter.
If they would be like letters they would have been decrypted a lot easier, it took till the stone of roseta till they decrypted it
b, a wouldn't make sense because in history in general people have tended to like meritocracy over aristocracy. C and D don't make sense because aristocracy doesn't include how hard a person works for a job
