Answer:
<u>D. Americans are less likely to identify themselves as group members today than in the past.</u>
Explanation:
Recently Americans do not difine themselves or identify themselves as a group members. In other times belonging to a certain gruop was part of a very importan aspect of americans. Americans identites can be based on another facts, maybe more individialistc aspects than actually belonging to a certain social group.
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I believe the answer is D because that's what the federal system of government means in america.
I think it would be (d) pyschoanalytic theorist.