Serbia and Austria-Hungary due to the Austrian-Hungarian Duke being assassinated presumably by someone in Serbia.
Answer:
A. The Indian Removal Act
United States control of Puerto Rico’s government with Puerto Ricans
becoming U.S. citizens after 1917; the Philippines providing a naval
base to guard U.S. trade in Asia, which in turn provided some
improvement in Filipino schools, roads, and healthcare.
It would be the "Ninth Amendment" that states that the rights in the U.S. Constitution are not the only rights that citizens possess, since the Founders wanted many rights to be reserved for the people and the states.
