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The roots of the word barbarian came from ancient Greece. The word barbarian was generally used at that time to describe any non-Greeks. Therefore the answer would be D. Greek.
C. Concerned citizens can write letters, show up at the polls, and will be wearing pins that say, "Honesty Now."
In relating to behavior, normal means ordinary. Someone who displays normal (and usually healthy) behavior like the majority of people. Abnormal behavior is just the opposite.
For example: Person A sees a poisonous snake. They get away from the snake in fear. This person has normal behavior. Person B sees the same snake. They get on the ground and play with the snake. This person has abnormal behavior.