Answer:
The correct answer will be- modifying the existed theory which could be proved with the repeated experiments.
Step-by-step explanation:
The atomic theory was proposed by the John Dalton which stated that matter is composed of an indestructible and indivisible unit called the atom. The advancement and understanding of the theory led to the discovery of sub-atomic particles like electrons by J.J Thomson, protons by Rutherford and neutrons by James Chadwick.
The new discoveries added new information to the existed theory which led to the modification of the theory by the scientific community. This also shows that scientific paradigm can be modified with time.
Thus, modifying the existed theory which could be proved with the repeated experiments is the correct answer.