Answer:
The Byzantines sent wave after wave of christian missionaries to the Slavic lands, which sorrounded the Byzantine Empire.
Two of the most important missionaries were Saint Cyril and Saint Methodious. They were brothers, and converted many slavs to Orthodox Christianity, specially those living in Moravia. They also invented the cyrilic alphabet to give a script to the Slavic languages, and help spread christianity faster. Hence the name of the alphabet.
 
        
             
        
        
        
Answer:
Option A, C, D and E
Explanation:
D-Day marked the end both the reign of Hitler and Germans. Germans were unable to handle the war. It also marked the largest war invasion through sea. France was taken back by allies and the allies further attacked Germany.  
  
 
        
                    
             
        
        
        
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