Was the U.S practicing Isolationism before the attack on Pearl Harbor? Explain.

Yes

Explanation:

Before the attack on Pearl Harbour, Americans wanted to stay out of the war because they considered it a 'European war' and due to the fact that many German and Italian immigrants lived there. Only after Pearl Harbour did America join into the war and after the war Isolationism was gone as FDR started connecting America with the rest of the world.

I hope this helps!

The correct answer is A) To ensure that it could conduct trade with and exert influence in China.

The Open Door Policy was introduced by America during the late 19th and early 20th centuries. During this time, America and many European countries (Spain, France, Britain, Portugal, etc.) were fighting for control of land and resources. With this in mind, the United States wanted to make sure that they did not get cut off from trading with China. Due to fear of control of China by another country, the US came up with this Open Door policy in hopes that all countries could have a beneficial trade relationship with China during this time.