The correct answer is Group A.
The group list that includes events of the Spanish-American War is Group A.
The United States had shown support to Cuba in its independence movement against the Spanish monarchy. The US government had sent some warships to the shores of la Havana, the capital city of Cuba. One of those ships was the USS Main that was sunk by the Spaniards. This incident made the US declare war against Spain in the so-called Spanish-American War of 1898. The US won the war and the peace treaty was the Treaty of Paris of 1898, in which Spain ceded new territories to the United States: Puerto Rico, the Philippines, and Guam.