|Question 2Verbal

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The decline of the giant ground sloth, a species found throughout South America before it became extinct around 8500 BCE, surely had a number of        the larger ecosystem in which it existed. The giant ground sloth was part of a complex food web with other organisms, and its disappearance likely affected several other species.
Which choice completes the text with the most logical and precise word or phrase?
sources in
A
consequences for
B
similarities to
C
precedents in
D