The correct option is A It articulates a crucial question for those interested in the existence of extraterrestrials.
Passage 1 and 2 both discuss the Fermi paradox: if there are technologically advanced extra-terrestrial civilizations, why haven't they visited us already? If there are extraterrestrials, where are they? This is a question that is very important for those interested in the existence of extraterrestrials. Thus A is the best answer.