I believe the answer to this is C.
South America can be divided into three physical regions: mountains and highlands, river basins, and coastal plains. Mountains and coastal plains generally run in a north-south direction, while highlands and river basins generally run in an east-west direction.
In addition, as ensured by the First Amendment, all American citizens are free to petition Congress or their state legislatures to amend the Constitution. To be approved, the amending resolution must be passed by a two-thirds supermajority vote in both the House and the Senate.
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