Answer:
Option B about shortage is correct &
Option C about surplus is correct 
Explanation:
Why "B" because if the price is less than the equilibrium price, then people will buy the products more and it also states the demand for it is greater than the equilibrium quantity leaving a shortage (less number of the quantity actually wanted)
Why "C"  because if the price is more than the equilibrium price, then people will buy the products less and it also states the demand for it is less than the equilibrium quantity leaving a surplus (an excess number of the quantity actually wanted will be left)
Brainliest will be appreciated
 
        
             
        
        
        
Answer:
The exchange of goods and services without the use of money
Explanation:
Difficulties with this may be: 
Lack of a common measure of value.
Lack of fair exchanges
Lack of double coincidence of wants.
Difficulty in storing value.
 
        
             
        
        
        
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Answer:
Countries are susceptible to forces that divide or unite them. Centripetal forces unite a country where centrifugal forces tend to divide. ... Nationalism, or the strong love of and loyalty to one's country, is also a powerful centripetal force and can create solidarity among the populace.