Which of the following is not required to become a naturalized united states citizen

In what way did expansion and global trade during the 15th to 18th centuries affect the economies of european countries

The internal combustion engine was an innovation of

Two gymnastics teams are intense rivals. the first team has started recruiting new gymnasts from different cities and even foreign countries in an effort to build a stronger team. after learning this, the second team begins its own recruitment campaign to find even better gymnasts. over a period of months, each team recruits dozens of players, each time trying to find a better recruit than its rival's most recent addition. which idea from the cold war is most similar to this scenario?