The main reason why this was the case is because Industrialization was an incredibly new phenomenon, and very few people could have predicted just how bad it was for the environment and for people's health.
        
                    
             
        
        
        
Answer:
d It stopped the German military advance to the East.
Explanation:
The Battle of Stalingrad was a major battle in World War II. It involves the German army and its allies against the Soviet Union Army. 
It was fought in September 1942, at which the German army lost about a quarter of their total army in the battle. And still could not take over the territory.
This led to the German Army unable to contain the invasion of Soviet Union soldiers when they advanced to the German territory.
Hence, the Battle of Stalingrad was considered a turning point of World War II because "It stopped the German military advance to the East."
 
        
             
        
        
        
<span>Arab traders took over the Silk Road trade, which undermined the Tang economy.</span>
        
             
        
        
        
Eli Whitney a U-S born inventor patented an invention called the cotton gin in 1794. The cotton gin revolutionized the production of cotton by greatly speeding up the process of removing seeds from cotton fiber. By the mid 19th century, cotton had become America's leading export. Despite the success of the cotton gin Whitney saw little wealth from the invention due to patent infringement issues.His invention also offered southern planters a justification to maintain and expand slavery even as a growing number of Americans wanted it abolished. Due to his reputation for creating the cotton gin he later secured a major contract to build muskets for the U.S. government in which he promoted the idea of interchangeable parts that made assembly faster and for easier repair.<span />