live in the U.S. for 5 years > understand the fundamental of U.S. history and government > swear allegiance to the U.S. Constitution
Explanation:
According to ucis.gov, to become an American citizen, you must have first lived in the U.S. for at least three or five years, be of 18 years of age prior to filing the document of citizenship, be able to read, write, and speak English, have a knowledge of U.S. history and government, and swear the Oath of Allegiance. Out of the answers you have provided, "<em>live in the U.S. for 5 years > understand the fundamental of U.S. history and government > swear allegiance to the U.S. Constitution</em>" seems to compose of the most relevant steps <u>in order</u> to become a naturalized citizen.
It would be "Tikal" that is the largest Mayan ruin and contains one of the tallest structures in Pre-Columbian America, although it's the actual temples within Tikal that count.
One reason could be because of communism. as countries becoming more and more poor because of WW2 they turned to communism, or dictators (people who promised better life). Cuba, Korea, and many others have fallen to this state. the US was very concerned about themselves and other's because the spread of Communism.
