The opportunity cost is the value of the next best alternative foregone. Every decision necessarily means giving up other options, which all have a value. The opportunity cost is the value one could have derived from using the same resources another way, though this is not always easily quantifiable.
        
                    
             
        
        
        
Answer:
Correct answer is A.  Determine the resource's original medium of production.
Explanation:
A is correct answer because it is important to know how reliable the source - is it forged or not, and its validity - to see if the information contained there are true.
B is wrong because it is not important who the author is, but is he reliable enough.
C is wrong because it doesn't matter how many time the resource has been published, if it is not reliable.
D is not important, because idea itself is not telling us enough about its importance and validity.
 
        
             
        
        
        
When the American Revolution ended in 1781, the states were out of money. Who could they
ask for money? 
Great Britain
 
        
             
        
        
        
<span>Europeans became dependent on goods from the middle eastern and asia</span>