Which happened first?
The nation-states of Greece, Serbia, Bulgaria, and Romania were formed as a result of the breakup of the Ottoman Empire.
Victor Emmanuel fought for national unity of Italy.
Feudal lords and the Catholic church lost power when monarchs began to consolidate political power.
Wilson promoted the principle of national self-determination.

Correct answer:
Feudal lords and the Catholic church lost power when monarchs began to consolidate political power.