Athenian democracy developed around the 6th century BC in the Greek city-state (known as a polis)
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Answer:
B. Unions are harmful because they encourage violence
Explanation:
The poster shows groups of workers that look as if they are causing destruction and violence. With the figure on the right, it seems they are the ones to put out this violence, so you can say this poster is going against the creation of Unions.
B is the correct answer.
While the Indus Valley has gotten more attention in recent years, it is not considered one of the three classical civilizations.