Answer:
Let me guess these are your options
a)putting Europeans at the head of new governments.
b)opening up new trade routes in the empire.
c)creating allies in newly formed nations.
d)weakening the empire as a whole.
the answer is D
Step-by-step explanation:
Nationalist movements in the Ottoman Empire helped Europe by weakening the empire as a whole - d
Because there were different nationalist movements in the nations that were conquered by the Ottoman empire, they could undermine Ottoman authority and rule and slowly but surely make the populace believe that they should revolt against the Ottoman people.