The words "discrimination", "segregation" and "integration" refer to the group interaction between the majority and minority - integration suggests a positive interaction and the other two a negative one. But they don't describe a group, so they can't be a correct answer.
The correct answer is "ethnic group" - it's more than race since culture is also shared!
A primary source is a source that was created by someone who actually experienced that point in history.
Three examples of this could be a photograph, a diary entry, and a letter.
I’m not sure but I guess a