Because as people were traveling it was easy for them to access all of the goods. 
        
             
        
        
        
Answer:
its A. if a firm faces higher costs of production, then it will earn lower profits at any given selling price for its products. As a result, a higher cost of production typically causes a firm to supply a smaller quantity at any given price. In this case, the supply curve shifts to the left.
Explanation:
 
        
             
        
        
        
The earliest introduction of zebra mussels in united states probably  occurs in 1986.
 At that time, commercial vessels from Europe went to north America as a place for freshwater ballast stowaway. They merchants then introduced zebra mussels to the market and it gained popularity ever since. They also introduced zebra mussels population in local lakes and let them reproduce there.
 
        
             
        
        
        
Its C. Cause of what happened more people sutered cause there was no additional help
        
             
        
        
        
Answer:
The correct answer to the following question will be "Differential association theory ".
Explanation:
Sutherland assesses throughout this theory whether an illegal activity is not to be dismissed out of hand by labeling the suspect 'easy'. Like most social education concepts, this theory assumes that such a person's actions are affected and conditioned by certain participants with whom they are associated.
- The predominant comparison group seems to be the nuclear family, with whom the adult lives as well as gets older or develops. Such experiences are believed to create an interpretation of social expectations and expectations for entities.
 - The above discovery creates legitimacy for such a theory or concept of differential associations.