The letter that makes the Louisiana purchase is A
        
                    
             
        
        
        
The implementation of the assembly line by Henry Ford at his automobile plants was extremely important. It was important because it drastically reduced the amount of time it took to produce a Ford car. Since it took less time and effort to make the car, the price of Ford's dropped significantly. This drop in price made Ford cars more available to the American public, increasing the amount of people who owned cars in the US during the 1920's. 
The development of the assembly line changed everyday life for Americans in multiple ways. First, traveling became much easier as cars were now available to more Americans. Along with this, the assembly line would be a method used by thousands of other companies all across the US. This made it so that workers would need to be able to complete one repeatable task throughout the entire day. 
 
        
             
        
        
        
The prehistoric era predates writing. Human progress included primitive tools and weapons, clothing, fire, cave art and burial of the dead. During the Old Stone Age, human beings were learning, but they were learning slowly. Then around 10,000 years ago progress began to speed up, with developments like agriculture, the domestication of animals, the creation of permanent villages and cities, etc. Writing began to appear around 5,000 years ago (around 3,000 BC) and that may be the beginning of what we call history, since we begin to know what people were thinking as well as what they were doing.
        
             
        
        
        
The <span>states are prohibited from making changes to the constitution during the ratification process because it is still the time when the proposed bill has to go under a certain process. It is very a tedious job among he legislators. The history of ratification started when the s</span><span>tates had to power to amend the United States constitution.</span>