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Essayist: When the first prehistoric migrations of humans from Asia to North America took place, the small bands of new arrivals encountered many species of animals that would be extinct only 2,000 years later. █████ ██ ██ ███████████ ████ ███████ ██ █████ █████ █████ ██ ██████ █████ ████ ███ ████ ██ ███████ ███ █████ ███████████████ ██████████████ ███ ██████ ██ █████ ███████ ████ ███████████ █████ ██ ███ ███ ████████ ██ ████ ██ ██ ███ ███████ ████ ████████ █████ █████ ██████████████ ████ ████████ ███ ███████ ██████ ████ ████████ ███ ███ ████████████
Summarize Argument: Phenomenon-Hypothesis
The essayist hypothesizes that microorganisms brought to North America by prehistoric humans were the key reason that many species of native animals went extinct within the next 2,000 years. This is because it's implausible that the prehistoric humans would have been able to hunt those animals to extinction, and those same humans certainly brought microorganisms with them.
Notable Assumptions
The essayist assumes that there were no other means besides hunting and microorganisms that could’ve caused the animals to go extinct. For example, perhaps those animals were sensitive to climate changes around that time.
21.
Which one of the following, ██ █████ ████ ███████ ███ ██████████ █████████
a
Animals weakened by ███████ ███ ███ ████ ████ ████ ██ █████ ███████ ███ ███ ████ ████ ████ ██ █████ █████ █████ ██████████
b
Human beings generally ████ █ ███████████ ██████ ██ ██████████ ████████ ██ ███ ████████ ███████ ██ █████ ████████
c
Very few species ██ █████ ████████ ███████ ███ ██████ ██ ███ ███ ████████ ████ ████ ████ ███████ █████ █████ █████ ███ █████ ███████████
d
Individual humans and ███████ ███ █████ █ ███████████████ █████████████ ███████ ██████████ █████████ ████ ███ ████████
e
Some species of █████ ████████ ███████ ██████ ███████ ████ ████ █████ █████ █████ ███ ███████ ██ █████ ███████ ██ ███ █████ ███████████ █████ ████████ ████ █████