Answer:
A civilization is a complex culture in which large numbers of human beings share a number of common elements. Historians have identified the basic characteristics of civilizations. Six of the most important characteristics are: cities, government, religion, social structure, writing and art.
That is a very broad opinion but I guess you can say america was protecting its boarders so yes
This answer is true, it has decreased significantly around 56%.
True
(hopefully at least I think its true XD)
Answer: D
Explanation: Hint: unemployment or employment