How does the U. S.' response to WWII breaking out compare to their reaction to WWI starting?

How did imperialism play a role in sparking world war i?

An example of a unitary government is a western government like select one: a. russia b. north korea c. france d. united states

What were some reasons as to why britain and france followed a policy of appeasement when dealing with german, italian and japanese aggression (give me 3)? what did this policy lead to?