Japan joined the axis powers because of their problems between china and Japan
The War of 1812 began with an attack on Canada. A serious northern-front invasion of the United States, including New York, was prevented. General William Henry Harrison's forces did manage to kill Tecumseh at the Battle of the Thames in 1813. Admiral Cochrane's unsuccessful invasion of Baltimore inspired Francis Scott Key to write the Star-Spangled Banner. The British hoped to cut off American use of the Mississippi River with an invasion of New Orleans. Andrew Jackson's ragtag army soundly defeated the British in New Orleans on January 8, 1815.
I think the answer is a. but I could be wrong.
Isolationism is a foreign policy chosen when a president (especially Harding and Coolidge) decides to keep other countries' problems at a distance and does not want to get involved. This can be done for two reasons: it can be done because a country does not want to get drawn into a dangerous situation or it can be done because the head executive may believe there is a benefit to not having trade agreements or mutual pacts with another country.
They believed that they had a God-given right.