Its C. The Monroe Doctrine said that European countries couldnt interfer with North or South American affairs. The Doctrine was enforced by the British because the US had no way of enforcing the Doctrine because it was still weak. Britian agreed to enforce it becuase it allowed them to keep and expand their trade interest in the Americas.
The people revolt. They'll rise up and try to overthrow the government.
Answer:
Option C. German submarines sinking the British liner Lusitania.
Explanation:
The event that angered The United States of America was the sinking of the Lusitania liner, which was hit by an exploding torpedo that killed 272 people, 27 of them Americans. The US sent 3 notes to Berlin as a protest, then Germany decides to apologize and end the submarine warfare.
C is the correct answer because the Aborigines were not immune to European diseases
