What is the main impediment for interstellar travel?
A) the high cost of technology enabling travel at the speed of light
B) the fear of encountering hostile life-forms
C) a lack of international cooperation
D) that only unstable wormholes can be created with current technology
E) Current technology cannot produce the energy necessary to travel at high enough speeds to make interstellar travel worthwhile.
Correct Answer:
Verified
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