Well, he supported the Greek independence revolutionaries in 1824 who wished to separate from the Ottoman Empire, an early move into European affairs.
Also he supported Adams, and his endorsement ultimately secured Adams' win in the house. <span />
"<span>C. The Roman army was strong, but was still unable to defend Rome from the Visigoths"</span> correctly describes events that led to the fall of Rome, although there were internal issues as well.
He is considered one of the greatest generals of modern times and one of Italy's "fathers of the fatherland", along with Camillo Benso, Count of Cavour, Victor Emmanuel II of Italy and Giuseppe Mazzini.