Answer:
They created an alliance with other nations.
Explanation:
D. The Olmec. They build large stone head sculptures that required a great deal of manual labor to make.
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The answer is
<span> Which happened as a direct or indirect result of the Crusades?
</span>D. Europeans began to trade for new products from the East.
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The tuskegee airmen were the first African American soldiers to complete their courses and successfully join into the air force, also known as the Army Air Force.