The answer is A because the significance of gunboat diplomacy is military threats which is a foreign policy used to scare the less powerful nation so that they follow the most powerful nations demands.
Answer:
They believed that the Vietnam War was a mistake. By 1968, a majority of Americans believed that the Vietnam War was a mistake. The other choices given above are not related to what happened during 1968. Hope this answer helps.
To make the League of Nations, restore countries, and to have no secret alliances. That’s the a majority of it I might have forgotten one last part
D. Mayan civilization of Mexico and Central America