Isolationism. 
Isolationism was the general policy advocated by members of the public and led by members of the Senate which advocated for the US staying out of wars in Europe and Asia that did not involve it, especially in light of the US's slow emergence from the Great Depression. 
 
        
             
        
        
        
The answer should be B. through both diplomacy and strength of arms
        
             
        
        
        
In that time period it called the era of good feelings because James did an amazing job during that period. he also made political differences to disappear and federalist party seemed almost nonexistent.
Hope this helps
        
             
        
        
        
What about it?
I don’t even know what is your question