Supporters of manifest destiny believed it was the nation’s duty to 1. maintain peaceful relations with other countries. 2. preserve traditional ways of making a living. 3. spread democracy and christian ideals. 4. live in harmony with american indians.

   3. Spread democracy and Christian ideals.

Explanation:  Supporters of Manifest Destiny were convinced that they had an obligation and right under the divine mandate to extend the United States to the whole continent in order to promote human rights, i.e. Christian ideals, capitalism and democracy. According to their belief, this act of expansion was inevitable as the act of spreading Christian ideals. The idea that the Americans were destined by God to carry out the spread of democracy throughout the North American continent has led to major transformations in the culture and religion of native people, as well as changes in the landscape, way of life etc.

i think the answer is b.

the correct answer is: the fact that the anti-federalist papers were considered poorly written.