The answer is letter C and B. Puerto Rican citizens do not vote for the president. They are US unincorporated territory and they are considered American citizens and are using the US Dollar as currency. Just like Guam, they can freely move to any any another place in the US.
The majority of the European uprisings failed as a result of military force and a lack of popular support. (Option b).
Revolutions of 1848, constituted a series of republican revolts against European monarchies, beginning in Sicily, and spreading to France, Germany, Italy, and the Austrian Empire. All those riots resulted in failure and repression, following by widespread disillusionment among liberals.
Answer: D- Declaration of Independence