Where were the first experiments in building empires conducted

The Middle East

Explanation:

The Middle East is the region that is considered as the birth of civilization. It is also the region that gave birth to the first empires. The first civilization sin this region, such as the people from Mesopotamia, Egyptians, Hittites, Assyrians, all have formed their own countries. Because of their advancements and constant need for more resources, they started to perform military campaigns through which they wee conquering new territories. Those were actually the first attempts of building an empire, at least from what is known so far from the history.  

the answer is c.

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the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.