Answer:
Option D, often earned wages insufficient to support their families adequately, is the right answer.
Explanation:
In order to recover the economy, the United States encouraged the factory system and underwent the Industrial Revolution. Though all the output came from the machines, the owners required workers to operate the machines. Since lots of people were unemployed, they usually accepted to work at low wages. Sometimes the wage was so low that the workers failed to support their families.
 
        
             
        
        
        
Answer:
1935 was when child labor abolished
 
        
                    
             
        
        
        
Hello!
I think you are missing the situations, but if are the following:
A) the passage of the Fugitive Slave act of 1850
B) ...
  C) ...
D) the argument against the expansion of slavery in the Wilmot Proviso of 1848
Then, the answer is D. the argument against the expansion of slavery in the Wilmot Proviso of 1848
Hope this helps :)
 
        
             
        
        
        
The United States first began developing nuclear weapons in 1939, during World War II, under the order of President Franklin Roosevelt. Motivation was the fear that US was engaged in a race with Nazi Germany to develop nuclear weapon. This project is best known as Manhattan Project.
        
             
        
        
        
V=d/t
v is speed 
d is distance
t is time