Answer:
C) Better military leadership
Explanation:
The South fought for a living, thus had a great army, however the North was new to the fighting life and military. 
 
        
             
        
        
        
Roger Sherman's proposal (known as the Great Compromise and the Connecticut Compromise) was that there would be a bicameral legislature in the American government and that proportional representation would exist in the lower house and the upper house would be equally weighted between the states.
        
             
        
        
        
They built the military up and started becoming allies with Germany 
 
        
             
        
        
        
"<span>a. Masters could reclaim slaves who fled to other southern states" is the best option from the list, since this was one of the most controversial acts that was one of the leading catalysts for the outbreak of the Civil War.</span>
        
             
        
        
        
A. radio
The radio became popular in the 1920’s due to Americans finding a new interest in music.