What was a plan to ban slavery in territory gained from Mexico?
O A. The Fugitive Slave Act
OB. The Missouri Compromise
O C. The Wilmot Proviso
O D. The Dred Scott decision

the  Wilmot Proviso was designed to eliminate slavery within the land acquired as a result of the Mexican War (1846-48).

Explanation:

C. The Wilmot Proviso

Explanation:

The Wilmot Proviso was an unsuccessful 1846 proposal in the United States Congress to ban slavery in territory acquired from Mexico in the Mexican–American War. The conflict over the Wilmot Proviso was one of the major events leading to the American Civil War.

The best lesson we can learn is that great powers can not be free from foreign commitments, from being involved in global affairs, because this neglect will in the end bring negative consequences. It is imposible, given the degre of interconnection among all nations.

After World War One, president Woodrow Wilson promoted the League of Nations, an international organization that was supposed to promote peace and security in the  world. But then the Unites States refused to join it and also refused to ratify the Treaty of Versailles. Isolationism won. Besides, the League of Nations had no legal instruments to enforce their peacekeeping decisions.  Lesson were learned the hard way in the 1920s and 1930s, a time that saw the rise of fascim and totalitarianism; another world war and dozens of millions of dead were part of that process.    Permanent global involvement of strong nations is inevitable, it´s part of the balance and order in the world.

Explanation:hope it helps