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Claribel performs loops easily because she has adapted to zero gravity .
Therefore, the correct answer is B. She has adapted to zero gravity .
Reason: She does not need to fight Earth’s gravity.
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The strongest clue is that Claribel revives with oxygen and collapses again in station air .
Therefore, the correct answer is B. Claribel revives with oxygen then collapses again .
Reason: The contrast directly links her condition to oxygen.
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Jim dismisses the warning because he trusts the duplicate alarm system .
Therefore, the correct answer is B. He trusts the duplicate alarm system .
Reason: He assumes the alarms would have sounded.
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The danger was caused when an eclipse froze part of the air purifier and the connected alarm failed .
Therefore, the correct answer is B. A rare eclipse froze part of the purifier and the alarm failed .
Reason: The second alarm was not connected.
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The main irony is that a small bird succeeds where expensive technology fails .
Therefore, the correct answer is B. A small bird succeeds where expensive technology fails .
Reason: Claribel provides the warning the engineered system misses.