The USA launched the Apollo8 mission in 1968. By launching this mission it became the first country that sent humans to the moon. Therefore, (B) is the correct option.
Between 1945 - 1991, during the cold war era, the USA and the Soviet Union were competing in every possible sphere and space was no exception. This competition in the space sector between both nations is known as the Space race.
In 1968, with the launch of the Apollo 8 mission, the USA got successful in sending humans to the moon before the Soviet Union. Therefore, (B) is the correct option.
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