The policy established by Mikhail Gorbachev was called glasnost and it can best be described as the policy of open discussion of political and social issues, which resulted in changes to the Soviet political structure. The correct option among all the options that are given in the question is the second option.
        
                    
             
        
        
        
The Limpopo river separates Botswana and South Africa
        
             
        
        
        
D. Because women didn't have many rights and richer people had more rights as well
        
                    
             
        
        
        
Answer:
-led to an arms race in Europe
-each country produced battleships, guns, and explosives
-size of military determined how powerful a nation would be
Explanation:
 
        
             
        
        
        
Answer:
Correct answer is A) serfdom
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Explanation:
The main reason why option A is correct is because although they even wanted to reform serfdom they weren't able to do so, as they needed the support of nobles.
All other options are not correct as they made reform in the area of education, religion and justice system under the influence of Enlightenment.