At night, a flock of crows will generally perch close together in a small place often a piece of wooded land—called a...
jsmart3211December 1, 2018
why is C wrong
I was stuck between C and E, but I think I know the reason. Is C incorrect because it reads that "...more than eight kilometers from their host," which could mean that the author is referring could be referring to ..."hunting extends as far as 100 to 130 kilometers"?
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In reading the stimulus, we know that the crows have a hunting range that goes out as far as 100 to 130 km from their roost. We also know that when crows change their roost site, it's usually less than 8 km from the old one.
What does this mean? It means that their hunting territory is, for the most part, the same as it was when they were at their previous roost. The easiest way to picture this is by imagining their hunting territory as a circle going out 130 km and then making another circle for the hunting territory from their new roost. The two circles will make a Venn diagram in which they mostly overlap one another, so we know that their hunting territory is largely the same.
If this were a question asking us for a most strongly supported answer, then we'd expect the answer choice to say something like, "the hunting territory of the birds remains largely the same after they move roosts." However, we're looking for an answer that can be most justifiably be rejected, so we're probably looking for something that's close to the opposite of what we would expect if this question were asking for a most strongly supported answer.
(C) cannot be rejected because it's plausible that the crows do most of their hunting and scavenging more than 8 km from their roost. The only info we're given is the range of their hunting territory, but we don't know where they do most of their hunting, so (C) can't be rejected.
(E) can be rejected because, as noted above, the hunting and scavenging area of the crows after moving to a new roost is almost the same, as the Venn diagram of their old and new hunting territories would largely overlap.
Hope this helps. Let us know if you have more questions!
