After World War II, the U.S. worked with Germany, particularly leveraging the expertise of German scientists like Wernher von Braun, to advance its rocket technology for the space program. This collaboration led to the creation of the Saturn V rocket used in the Apollo missions. Other countries did not have the same direct influence on U.S. rocket development during this period. ;
The U.S. worked with Germany after World War II to build rockets for its space program. German scientists, including Wernher von Braun, played a crucial role in advancing rocket technology, leading to significant achievements like the Apollo missions. Thus, the correct answer is C. Germany.
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