Migratory North American songbirds like the Tennessee warbler and the Baltimore oriole depend on the dense tree cover that has long been a feature of South American coffee plantations. This tree cover is being eliminated. Yet a population decline among Tennessee warblers is being attributed to a temporary drop in the population of spruce budworms, the warbler’s favorite North American prey. Baltimore orioles, however, do not eat budworms and are also experiencing a population decline.
The information above, if accurate, could best serve as part of an argument that
A. the decline in the numbers of the Tennessee warbler is responsible for the decline in the population of the spruce budworm
B. the Tennessee warbler population will not rebound when the spruce budworm population returns to normal
C. variations in the population of the Tennessee warbler influence the numbers of the Baltimore oriole
D. the population of Tennessee warblers can reasonably be expected to increase in the near future
E. the population of Tennessee warblers is declining less sharply than the population of Baltimore orioles
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