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【OG20-P578-663題】Boreal owls range over a much larger area than do other owls of similar size. Scientists have hypothesized that it is scarcity of prey that leads the owls to range so widely. This hypothesis would be hard to confirm directly, since it is not possible to produce a sufficiently accurate count of the populations of small mammals inhabiting the forests where boreal owls live. Careful study of owl behavior has, however, shown that boreal owls do range over larger areas when they live in regions where food of the sort eaten by small mammals is comparatively sparse. This indicates that the scientists' hypothesis is not sheer speculation.
In the argument given, the two boldfaced portions play which of the following sheer speculation
A. The first presents an explanatory hypothesis, the second states the main conclusion of the argument.
B. The first presents an explanatory hypothesis;the second presents evidence tending to support this hypothesis.
C. The first presents an explanatory hypothesis, the second presents evidence to tending to support this hypothesis support an alternative explanation
D. The first describes a position that the argument opposes, the second presents evidence to undermine the support for the position being opposed
E. The first describes a position that the argument opposes; the second states the main conclusion of the argument.
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文字解析
第一個bol
A.第二個boldface是主要結論，錯，它的下一句才是
B.第一個是個猜想，第二個呈現(xiàn)了證據(jù)來支持猜想，正確，反駁了反駁即為支持
C.第二個呈現(xiàn)證據(jù)來支持另外一個解釋，錯誤
D.第一個是argument所支持的，不是反駁的
E.第一個是argument所支持的，不是反駁的，第二個boldface不是主要結論
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