Atheory which repeatedly fails to confirm the expected predictions after extensive research: probably needs to be modified probably is incorrect requires more research time should be maintained indefinitely

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Is probably incorrect.

Explanation: -

According to the theory of scientific method, the second step after observation is formulation of hypothesis to explain the observed phenomena.

If the predictions of a long-standing theory are found to be in disagreement with new experimental results, the theory may be discarded as a correct description of the phenomena.

Thus a theory which repeatedly fails to confirm the expected predictions after extensive research Is probably incorrect.

b. probably is incorrect

hope it helps :)

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?