As far as social class, the King had the greatest amount of power in Europe, Nobles came second.
        
             
        
        
        
I’m not sure if you mean technological and economic development or just products coming out kind of development. 
Well I’m not gonna write out two paragraphs but some important tech and economical developments were:
The radio became widespread. It was welcomed by the public and by 1934 almost 60% of the US had radio access. Sports events, news, dramas and more were broadcasted through the radio. 
Stock markets across the west developed negatively. On Black Tuesday, stock markets crashed, sending the world into the Great Depression. 
        
             
        
        
        
Answer:
The French navy served as an invaluable ally to the fledgling American fleet and French land forces helped win the decisive battle of the war—victory at Yorktown. Like France, Spain provided aid to the colonists in the form of funding, as well as by fighting Britain on a second front.
Explanation:
Read it in a article. My apologies if im wrong.
 
        
             
        
        
        
Answer:
The answer is C
Explanation:
Thomas Jefferson called delegates servants of the people.