Omg your so talented I can get it in the morning and then you send it
Answer:
2, it's the best option out of all of them. If I had a choice though I would say 8 is the best.
There were lots of foreign changes that presented challenges for the US. I'll give you a few examples from different time periods. First would be when England wanted to tax the Americans in the Revolutionary period. They did this to try and restrict America's freedom. Another example would be that Russia had spies during the cold war period. This was to gain intelligence of the US war plans. Also when Germany sent the Zimmerman Telegram to Mexico during the WWII period. This was to get Mexico to launch a surprise attack on the US.
As of 2017, the second most populated country in Europe is Germany, with a current population of 82.79 million people.