The correct option is C The Soviet president agreed to remove missiles from Cuba.
The Kennedy government in the US had received intelligence that the USSR was secretly installing nuclear missiles in Cuba. In April 1961, while landing an army of Cuban exiles on the island of Bay of Pigs, the US bombed Cuban airfields to overthrow Castro's regime. US warships surrounded Cuba. Later, the Soviet President Krushchev agreed to remove missiles, and in return, the US agreed not to invade Cuba again.