Which group did Cyrus the Great overthrow when he founded the Persian Empire

Cyrus led a revolt against the Median Empire and by 549 BC he had completely conquered Media. He now called himself the "King of Persia." Cyrus continued to expand his empire.

Explanation:

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the answer is a. 250 percent.

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.