Although the aquifer is used by both southwestern Oklahoma and the Panhandle regions, the Panhandle region relies most heavily on water from the Aquifer.
Best answer is the Panhandle
Christopher Columbus is the explorer who is credited for discovering America. Of course, there were already people living in America at the time who we call Native Americans. There even was a European, Leif Ericsson, who had been to the Americas before. However, it was Columbus' voyage that started the exploration and colonization of the Americas.
The answer is Check for style and tone.
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