Multiple Choice
Suppose it turns out that one in 1 million stars has a planet that at some point in its history is home to an advanced civilization. Then the total number of civilizations that have arisen in our galaxy would be closest to .
A) 40,000
B) 4,000
C) 400,000
D) 400
E) 40
Correct Answer:
Verified
Correct Answer:
Verified
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