The Bay of Pigs invasion was a failed attempt by the U.S to invade Cuba and overthrow the communist Castro regime. The correct option among all the options given in the question is option "C". Bay of Pigs invasion took place on 17th of April in the year 1961. It was a actually a CIA sponsored paramilitary group Brigade 2056 that tried to overthrow the Castro led government, but the attempt failed very badly. This failed invasion actually made Castro’s position stronger than ever before.