The answer is A Im almost sure, I could be wrong...
Mansa Musa's net worth today is about $400 Billion.
<span><span>The idea for American veto system came from the Romans.</span>
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"To accommodate for lack of dependable rainfall" would be the best option as to why the ancient Chinese organized large groups of people to build and maintain irrigation systems, since when rainfall would not come for long periods of time, the crops would likely die without proper irrigation.