Final answer:
Liberia had long-term success with adopting democracy, inspired by the U.S. Constitution and Bill of Rights.
Step-by-step explanation:
The country that had long-term success with adopting democracy, inspired by the U.S. Constitution and Bill of Rights, is Liberia. Liberia was established in the early 19th century as a settlement for freed slaves from the United States. They drew upon American democratic principles and created a constitution similar to that of the United States.
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