Based on Document 2, the most compelling explanation for becoming revolutionary to Che Guevara was "liberating Cuba from its neocolonial relationships."
Who is Che Guevara?
Che Guevara wanted to help the Cuban Revolution for different reasons and beliefs. Although freeing Cuba from its neocolonial ties was important, it's also important to know that Che's revolutionary beliefs had wider goals too.
Che Guevara wanted to free Cuba from being controlled and exploited by foreign powers, especially the United States. He wanted Cuba to be free from outside control and become its own country.