Which of these is considered the "spark" that began World War I?
AThe assassination of the heir to the Austrian throne.
BImperialistic competition among European nations.
CMilitary build-up in industrialized countries.
DThe growth of European nationalism.
AThe assassination of the heir to the Austrian throne.
BImperialistic competition among European nations.
CMilitary build-up in industrialized countries.
DThe growth of European nationalism.