Which was a cause of world war 1
a the unification of separte german states into one nation
b austria-hungarys imperialist ambitions to dominate the balkans
c the invasion of belgium by german troops
d russias desire to stay out of military alliances

2. how did expectations at the beginning of the great war differ from reality?
a fewer countries were going to be involved than people expected
b fighting was only going to happen on land while people expected naval battles
c technology was not going to have an impact as people expected it would
d the war was going to last longer then people expected.

in advance