English Language · English
What conclusion can be drawn about humanity's efforts to communicate with extraterrestrials over the last two centuries?
- 1Modern efforts rely solely on visible light-based methods.
- 2Interest and investment in contacting extra-terrestrials increased as technology improved.✓
- 3There have been no attempts to contact extra-terrestrials since the 19th century.
- 4Only the United States has made significant attempts at extra-terrestrial communication.
Correct answer
Interest and investment in contacting extra-terrestrials increased as technology improved.
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