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Under what circumstances will a scientific theory be changed or discarded? A. New experimental evidence is not compatible with the theory. B. Many experiments give the results predicted by the theory. C. A scientist makes a hypothesis that contradicts the theory. D. A scientist proposes a competing theory.

Respuesta :

A scientist proposes a competing theory.

The scientific theory has been changed or discarded when a competing theory has been proposed by a scientist. Thus, option D is correct.

The experiments have been performed with the establishment of the hypothesis that has been accepted and rejected at the results of the experiments.

The scientific theory has been proposed based on the several research that has been able to put forward the hypothesis. With the proposal of the competing theory, there has been the change or discard of the existing theory.

The scientific theory has been changed or discarded when a competing theory has been proposed by a scientist. Thus, option D is correct.

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