Answer:
Hey there!
I think the answer is A. Security. As America was expanding, people went to the west for more jobs, (opportunity) and more land. Thus, they were more free to do what they wanted.
Hope this helps :)
A. They believed if they appeased Hitler's demands, he would stop his future pursuits of territory.
Crops people need to survive. Rice and corn
-less attacks
-don't have to share food and water
-don't have to share other resources
-can have land
-less religious disagreements
-more time goes to farming and math and stuff like that and less to war-planning