Answer:
B. It shows that the best reason for exploring space is because it exists.
Explanation:
When George Mallory was asked why he wanted to climb Mount Everest, he replied "Because it is there." This response was perfectly reused by Kennedy in his speech to justify the space race, as many people criticize the spending of public money on research to explore space. Kennedy, citing Mallory's response, said that human beings must know and explore space because it exists and is part of our lives directly, and it is essential that we know it.