I believe that the first choice is the correct one
Answer:
The answer is Nomadic pastoralists who lived on the steppe lands of southern Russia.
Explanation:
According to the Kurgan theory—which is the most popularly accepted theory regarding the early origins of the Indo-Aryans—the Indo-Aryans originated as a result of their activities as nomadic pastoralists who domesticated their horses and used chariots to expand their regions (as early as 3000 BCE) until they lived throughout the steppe Iands of then Eastern Europe; this region was around Southern Russia which came into existence hundreds of centuries later.
The Aztec empire is the answer
C I was wrong sorry about that should of double check my bad