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A mysterious illness begins spreading through a population. Scientists are able to isolate a certain bacterium in 90 percent of the cases. Does this evidence satisfy Koch's postulates in identifying the bacteria as the disease-causing agent?a. Yes, almost all bacteria are pathogenic and can cause disease.b. No, the bacterium must be isolated in every case of the disease.c. Yes, the bacterium is present in a statistically significant number of the cases.d. No, there is no way to prove for certain that the bacterium is causing the disease.

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