The three theories are warfare between city-state, overpopulation, and drought.
The best and most correct answer among the choices provided by your question is the first choice or letter A.
The impact of the invasion of India by Alexander the Great is that he<span> unified India and annexed It to his empire. </span>
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What is different about the system for collecting taxes under the Articles of Confederation as compared to the Constitution?
In the Articles of Confederation, states can choose the proportion of the tax they want to pay, while in the Constitution, Congress can choose a set tax.
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It was a more effective way to kill. It could kill a large amount of people. It would make them suffer more. You could see their eyes go away. Really bad in world war I