How did nationalism help contribute to the start of World War I?
O
A. It led many Europeans to view their own countries as superior to
other states.
B. It excluded certain ethnic groups from joining military alliances,
which created tension.
) C. It started the process of defining and changing national borders,
which eventually led to conflicts.
O
D. It created distrust between countries that practiced democracy
and those that did not.
(Apex)