The death of Annabel Lee was a mystery. The correct option among all the options that are given in the question is the third option. Her death is a mystery because a wind came down from the clouds and made Annabel Lee sick Ultimately she died of this sickness and nobody understood the reason of her sickness.
A bit more info: Cold War tensions between the U.S. and the Soviet Union from 1967 to 1979. The era was a time of increased trade and cooperation with the Soviet Union and the signing of the Strategic Arms Limitation Talks (SALT) treaties
