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Archaeologist: A skeleton of a North American mastodon that became extinct at the peak of the Ice Age was recently discovered. ██ ████████ █ ██████████ ██████████ ██████████ ██ ███ █████ ██ ████ ████ ██ ███████ ███████ ██ █████ ████████ █████ █████ █████████ ███ ███ ██████ ██ █████ ███████ █████ ███████ ██████ ███ ████ ██ ███ ███ ████ ███ █████ ████████ ████████ ██ █████ ███████ ████████ ████ ████ █ ████ ███████ ████ ██ ████████
Summarize Argument: Phenomenon-Hypothesis
The archaeologist concludes the first Eurasian settlers in North America were not the closest. Why? Because a projectile found in a mastodon is dissimilar from any in the closest part of Eurasia, and the first Eurasians in North America settled shortly before the North American mastodon went extinct.
Notable Assumptions
The archaeologist assumes the projectile could not have been made by people from the closest part of Eurasia, either because it resembles a projectile from elsewhere in Eurasia or because people from the closest part of Eurasia were less likely to develop a new projectile for some other reason. She also assumes that only the first settlers to North America from Eurasia could have made the projectile, and that it penetrated the mastodon while it was alive.
20.
Which one of the following, ██ █████ ████ █████████ ███████ ███ ███████████████ █████████
a
The projectile found ██ ███ ████████ ████ ███ ████████ ███ ████ ████ ████ ██ ███████ ██████ ██ ██████ ███ ███ ████
b
The people who ████████ ███ ████████ ████ ███████ ██ █████ ███████ ████████ ███████ ██████████ ███ ███ ████
c
The skeleton of █ ████ ████ ███ ████ █████ ███ ████ ██ ███ ████████ ████████ ████████ █ ███████ ███████████
d
Other North American █████████ ████ ███ ████ ██ ███ ███ ███ ███ ███████ ██ ████ ████ ███ ████ ████ █████ ██ ████ ███████ █████ ██ ████████
e
Climatic conditions in █████ ███████ ████ ██████ ███ ███ ███ ████ ████ █████████ ██ █████ ██████████ ████ ████ █████ ██ ███ ████ ██ ███████ ███████ ██ █████ ███████ ██ ████ █████