Answer:
an official ban on trade or other commercial activity with a particular country. 
Explanation:
 
        
             
        
        
        
FCC Fairness Doctrine--this doctrine created in 1949 required news programs present a balanced report on issues. 
This doctrine ensured that the news were presented fairly with both sides. This doctrine of reporting was in place until 1987 which then saw the birth of one-sided news broadcasting. 
        
             
        
        
        
the answer is D
Approximately 20 million people participate in self help support groups every day.
 
        
             
        
        
        
Answer:
Gold rush and mining opportunities (silver in Nevada) The opportunity to work in the cattle industry; to be a “cowboy” Faster travel to the West by railroad; availability of supplies due to the railroad. The opportunity to own land cheaply under the Homestead Act.
Explanation: