Answer:
The correct answer is A. The leader that launched successful revolutions against Spanish rule in the southern regions of South America was Jose de San Martin.
Step-by-step explanation:
Jose de San Martin was an Argentine general whose military campaigns were crucial for the victory of the independentist revolutions in Argentina, Chile and Peru. Together with Simon Bolivar, he is considered to be South America's most significant fighter against the Spanish colonial rule.
In Argentina, he earned the title "Father of the Nation" and is considered a national hero. In Peru, he is known as the "founder of free Peru". In Chile, he was awarded the highest military title.