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Why was the battle of gaugamela an important turning point in alexanders conquest of persians empire

How did the united states ironically create a slaverybased market economy and democratic political system?

Which of the following accurately describes the workforces of the united states and canada? a. most of the workforce in the united states and canada is employed in the service industry. b. most of the workforce in the united states and canada is employed in the educational field. c. most of the workforce in the united states and canada is employed in manufacturing and mining. d. most of the workforce in the united states and canada is employed in agriculture.