Which answer matches this clue: the 1860 battle on the Volturno River where Garibaldi's volunteers defeated the Bourbon army?

• A Battle of Calatafimi
• B Battle of Milazzo
• C Battle of the Volturno ✓
• D Battle of Castelfidardo

The Battle of the Volturno was Garibaldi's decisive victory near Capua that secured his control of the mainland south before handing it to Victor Emmanuel II.