Which of the following correctly lists the alliances that fell into place after the assassination of archduke francis ferdinand and his wife, duchess sofia?

a. austria-hungary, germany and the ottoman empire versus serbia, russia, france and great britain
b. austria-hungary, the ottoman empire and serbia versus france, germany, russia and great britain
c. serbia, france, and russia versus austria hungary, the ottoman empire, germany, and great britain
d. russia, the ottoman empire, austria-hungary and france versus serbia, germany and great britain