They needed to pay of the debt they accumulated from the war.
Answer: C
Explanation: Philip ll destroyed the Greek at the battle of Chaeronea in 338 BC!
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The option which is not a reason given for the Protestant Reformation is D. Martin Luther wanted to be Pope.
He never wanted to become Pope, he just wanted to create a reform of the Protestant Church so as to avoid selling of indulgences, among other things. He thought that the Pope was incompetent, and that due to the extreme importance of tradition in religion, something had to be changed.
The correct answer is - Large numbers of migratory birds;
The number of the migratory birds has always been pretty high and it hadn't resulted in the drying up of the Ogallala Aquifer, not to mention that those birds can not even reach that water because it is underground. Also, the number of the migratory birds have been steadily lowering, so even if they were using that water for drinking, it wouldn't have caused the drying out.
The Ogallala Aquifer has started to dry out because of numerous reasons, with the usage of its water for irrigation being the prime reason. The droughts have become longer, and the temperatures little higher, while the rainfall slightly smaller, so all of that affected the reserves of water in the aquifer negatively.