John Dalton Postulated That All Matter Is Composed of Small

John Dalton postulated that all matter is composed of small particles called atoms. For this proposition to be considered a valid scientific theory, __________

A) it must be continually supported by experimental evidence and testing.
B) it must be impossible to prove wrong by experiment.
C) all possible experiments must never find an exception to it.
D) some, but only a few, experiments may find exceptions to it.
E) it must be voted on by the scientific community and accepted by all.