The Ultimate Reason That Newly Unified Italy Was Able to Occupy

Multiple Choice

The ultimate reason that newly unified Italy was able to occupy Rome and make the city its capital was

A) withdrawal of the French garrison during the Franco-Prussian War.
B) the Pope's excommunication of Napoleon III.
C) the Pope's agreement to accept Italian rule in exchange for Italian government subsidies for the Vatican.
D) Austrian withdrawal following the 1866 defeat by Prussia.
E) withdrawal of German soldiers.