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Two groups of laboratory mice were injected with cancerous cells. One groupâ€™s cages were rotated in a disorienting manner. Two-thirds of these mice developed cancers. One-tenth of the mice in stationary cages developed cancers. The researchers concluded that stress enhances the development of cancer in laboratory mice.
The researchersâ€™ conclusion logically depends on which of the following assumptions?
(A) Rotating the cages in disorienting manner produced stress in the mice in those cages.
(B) The injections given to the two groups of mice were not of equal strength.
(C) Injecting the mice with cancerous cells caused stress in the mice.
(D) Even without the injections the mice in the rotated cages would have developed cancers.
(E) Even the rotation of cages in a manner that is not disorienting is likely to produce stress in mice in those cages
Please explain the anwser using the negation or denial test.
I think its A.
The assumption is that stress causes enhanced growth of cancer cells. By rotating the cages in a disorienting way, the mice were under stress and hence acquired a higher growth of cancer cells.
I think its A. The assumption is that stress causes enhanced growth of cancer cells. By rotating the cages in a disorienting way, the mice were under stress and hence acquired a higher growth of cancer cells.
Yes it is A
In order to the researchers' conclusion be correct, the change in rotation of the cages should have caused stress. If it didn't, then there must be something else that caused the the higher incidence of cancer in mice.
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