The Treaty of Tordesillas was an agreement made by Pope Alexander VI in 1494 to divide the world between and along a north-south line 1100 miles west of the Cape Verde Islands.

Explanation:

The treaty was signed at Tordesillas, Spain on June 7, 1494. It was authenticated at Setubal, Portugal. It divided the land of the New world between Portuguese empire and Spanish empire. It divided the lands along the meridian that was 370 leagues west of the Cape Verde Islands. Pope Alexander Sixth was the pope during the treaty, the land East of the line was given to Portugal and the land west of the line to Spain. The treaty was breached by 17th century as other European nations started to occupy lands in the New World.

your answer would b. the missisipi river

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