Multiple Choice
Which statements correctly locate the formation of the Earth and the appearance of the first humans on the cosmic calendar, which compresses the 14-billion year history of the universe into one "year," where "now" is exactly midnight, Dec 31?
A) Earth forms in early September, life begins in November, and humans appear on Dec 15.
B) Earth forms in January, life begins in September, and humans appear in October.
C) Earth forms in early September, life begins in late September, humans appear a few hours before midnight, Dec 31.
D) Earth forms in January, life begins in April, and humans appear in early December.
Correct Answer:

Verified
Correct Answer:
Verified
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