Question

A series of experiments, which are repeated over and over, seem to suggest that a scientific theory is incorrect.

What does this most likely mean?
The experiments were faulty.
The scientist was manipulating the results.
The theory must be revised.
The results should be modified to agree with the theory.

Answer 1

"The theory must be revised."

Repeated, reproducible experimental results that contradict a theory are the strongest sign that the theory is incomplete or incorrect and must be changed or replaced to fit the evidence.