Which of the following does not help explain why a small conflict in the Balkans spread to all of Europe? (5 points)
Answer
A Many of the European powers had signed treaties requiring them to defend each other.
B Slavs wanted to unite with other Slavs no matter which country they were living in.
C Germany's plan for war with Russia required launching an attack on France first.
D All of the major powers had strong military forces and were prepared to use them.
Please help!!!!!!

Question

Which of the following does not help explain why a small conflict in the Balkans spread to all of Europe? (5 points) 
Answer   
 A  Many of the European powers had signed treaties requiring them to defend each other.  
 B  Slavs wanted to unite with other Slavs no matter which country they were living in.  
C   Germany's plan for war with Russia required launching an attack on France first.  
  D All of the major powers had strong military forces and were prepared to use them.  
Please help!!!!!!