Which is better: United States, or PRC (China)

What causes the cyclical changes in the appearance of the moon?

South america is located within which hemisphere?

This map shows the member states of the european union (eu). based on this map, what is the most likely reason the eu was formed? a) to increase trade between european nations b) to protect themselves from foreign enemies c) to begin the process of forming one large nation d) to isolate europe from the rest of the international community j