B.
The US never declared war on Germany because of the Poland invasion. Britain and France declared war on Germany because of the Poland invasion.
The United States was having the most problems with Japan, and the US declared war on Japan shortly after they bombed Pearl Harbor.
Once the US declared war on Japan, Germany declared war on the US due to the Tripartite Pact.
The correct answer is A) It's government was well established.
At the outbreak of the Civil War, the American government has had the same structure for over a little less than a century. Whereas the Confederacy declared themselves free from the Union and created their own form of government that was extremely inexperienced. By the time the Civil War started, the Confederates had a government that had been in place for less than a year.
The Era of Good Feelings.
C. Both A and B is the correct answer
