The past perfect refers to a time earlier than before now. It is used to make it clear that one event happened before another in the past. It does not matter which event is mentioned first - the tense makes it clear which one happened first.
Answer:
C.president John f Kennedy
Explanation:
The Decision to Go to the Moon: President John F. Kennedy's May 25, 1961 Speech before Congress. On May 25, 1961, President John F. Kennedy announced before a special joint session of Congress the dramatic and ambitious goal of sending an American safely to the Moon before the end of the decade.
A science fiction is a story that seems scientific and true, but still is a creation of a writer's imagination
