PLZ HELP what item had arguably the greatest effect on the economy of the Americas?

Develop your own point of view on whether the us should have expanded its borders. use information from the lesson and the maps to explain your opinion. give at least two reasons for your point of view and answer the following in complete sentences.

The quote below is an excerpt from the charter of the united nations: "the purposes of the united nations are: to maintain international peace and security, and to that end: to take effective collective measures for the prevention and removal of threats to the peace, and for the suppression of acts of aggression or other breaches of the peace, and to bring about by peaceful means, and in conformity with the principles of justice and international law, adjustment or settlement of international disputes or situations which might lead to a breach of the peace . " source:this section implies that the united nations is prepared to do what to keep world peace?

What was significant about the election of 1828 a. it was first to include b. it was first under new voting reforms c. it reintroduced the two party system d. it was decided by members of congress