Identify the purpose to convene the Vienna of Congress in 1815 from the following options:
a) To declared competition of German unification
b) To restore conservative regime in Europe
c) To declare war against France
d) To start the process of Italian unification.
a) To declared competition of German unification
b) To restore conservative regime in Europe
c) To declare war against France
d) To start the process of Italian unification.