driven by economic ambitions and a sense that the United States was “destined” to span the entire continent, the war also raised the issue of how acquisition of such a large territory would affect the balance between slave and free states.
Answer:
Persia is a historic region of southwestern Asia witch is associated with the area that is now modern Iran.
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Earth's mass has remained constant, and thus the gravitational pull at the surface has decreased over time; Earth's mass has grown with the volume in such a way that the surface gravity has remained constant; Earth's gravity at its surface has increased over time, in line with its hypothesized growing mass and volume.
The third option seems to be the most likely, as the first and fourth options reflect conservative beliefs, and the second option isn't based upon party lines.
So the answer would be the third option.
