Question

one of the goals of the congress of vienna was to restore europe to the way it was
after the nationalist revolution in belgium.
after french liberals established a constitutional monarchy.
before the polish revolutionaries gained freedom from russia.
before the french revolution and napoleonic wars.

Explanation:

The Congress of Vienna (1815) aimed to reverse changes from the French Revolution (1789–1799) and Napoleonic Wars (1803–1815), restoring pre-revolutionary monarchies and territorial order. Other options reference events post-dating the Congress or unrelated to its core goal of "restoration."

Answer:

before the French Revolution and Napoleonic Wars.