which statement best describes how an existing theory is often affected by the development of new…

which statement best describes how an existing theory is often affected by the development of new technology?\nan existing theory is thrown out and replaced with a completely new theory based on the new observations.\nan existing theory is modified so that it can explain both the old and new observations.\nan existing theory remains the same because a theory is a proven fact that is always true.\nan existing theory is kept unchanged while a new theory is developed to explain the new observations.

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