Which of the following actions is most similar to city-planning techniques developed by the aztecs?
a. a business relocates its headquarters outside a big city to avoid paying the city's high taxes.
b. a city opens a new elementary school to serve a large immigrant population living on its outskirts.
c. a university designs a new building to ensure that astronomers will be able to easily observe the night sky.
d. a police force opens new police stations in neighborhoods that have had consistently high crime rates.

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?

Turkey a: nato b: warsaw pact c: not a member of either alliance

Search america's open door policy with china beginning in 1899. explain how relations with the united states and china have changed and the effects of the open door policy on both countries.