The correct option is D Diluting the German confederation of 39 states
Treaty of Vienna of 1815 was signed with the objective of undoing
most of the changes that had come about in Europe during the
Napoleonic Wars. The Bourbon dynasty, which had been deposed
during the French Revolution, was restored to power, and France
lost the territories it had annexed under Napoleon. A series of states
were set up on the boundaries of France to prevent French expansion
in the future. The
German confederation of 39 states that had been set up by Napoleon
was left untouched. The main intention
was to restore the monarchies that had been overthrown by
Napoleon, and create a new conservative order in Europe.