The correct answer is C) Spain.
The foreign power that was blamed for the sinking of the USS Maine on February 15, 1898, was Spain.
We are talking about the incident during the revolutionary war between Cuba and Spain. On the morning of February 15, 1898, the USS Maine ship was at the harbor of la Havana, the capital city of Cuba, when an explosion sank the ship and killed 260 US shipmen. The US accused Spain of the sinking and this was a cause that detonated the Spanish-American War.
The other options of the question were A) Great Britain. B) France. D) México.