Here are two truths about the Kellogg-Briand Pact.
1. It wanted to outlaw war, so that nothing like The Great War would ever happen again.
2. It failed to have any real impact in keeping nations from pursuing war, and we now call "The Great War" World War I, because it was followed by World War II.
French Minister of Foreign Affairs Aristide Briand and US Secretary of State Frank B. Kellogg were key proponents of the plan, which was signed by various dignitaries at the White House in 1928. The pact stated that the signing nations were "persuaded that the time has come when a frank renunciation of war as an instrument of national policy should be made," and so the signers of the treaty declared their opposition to war. By their example they hoped to encourage other nations of the world to join them in the same commitment.
The pact had little effect.
An amendment to the Constitution must be approved by 3/4 of the states (A). That's why it's so difficult for an amendment to be ratified.
The correct answer is 3) Worcester vs. Georgia
The McCulloch vs. Maryland case dealt with the idea of implied powers and interpretation of the US Constitution.
Loving vs. Virginia was a Supreme Court case that struck down state laws against individuals from a different race not being able to get married. This makes interacial marriages all over the US legal.
Worcester vs. Georgia was a Supreme Court case that established the idea that only the federal government has the authority to conduct deals with Native American tribes.
This shows why option 3 is the only correct answer.
Columbus' explorations of the New World led to the spreading of diseases to the Americas which killed thousands of Native Americans, his efforts led to the enslavement and oppression of Native Americans through colonization, and ultimately led to the subjugation of the Native American peoples to European powers for centuries to come.