Question
14 to 20 are based on this passage
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Question 14
According to the passage, which of the following is NOT a possible explanation to the Fermi paradox?
A. Alien civilizations might be avoiding contact with us.
B. Intelligent life might only exist on Earth.
C. There is something unusual about our solar system.
D. We lack the means to communicate with alien civilizations.
E. There is alien intelligent life, but we have not found it yet.
我的答案： 无