• European powers stopped colonizing the Western Hemisphere.

• The U. S. agreed to leave Europe's established colonies in the Western Hemisphere alone.

The box above describes

A. how the Treaty of Ghent ended disagreements from the War of 1812.

B. significant outcomes that resulted from the Monroe Doctrine.

C .why the Protocol of Peace led to the end of the Spanish-American War.

d. the standards of peace that Canada and the U. S. agreed to have with each other.

The answer to the question is option "B" which is  

"The significant outcomes that resulted from the Monroe Doctrine."

Explanation:

The Monroe Doctrine is the best known U.S. policy toward the Western Hemisphere. The doctrine is contained in a routine annual message delivered to Congress by President James Monroe in December 1823. The doctrine warns European nations that the United States would not tolerate further colonization or puppet monarchs.

The doctrine further declared that the Old World and New World had different systems and must remain distinct spheres. Consequently,  Monroe made four basic points:

(1) the United States would not interfere in the internal affairs of or the wars between European powers;

(2) the United States recognized and would not interfere with existing colonies and dependencies in the Western Hemisphere;

(3) the Western Hemisphere was closed to future colonization; and

(4) any attempt by a European power to oppress or control any nation in the Western Hemisphere would be viewed as a hostile act against the United States.

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the fundamental orders of connecticut it would be the letter b