Which of these is the most likely reason why the steady state theory has been rejected by the scientific community?
scientists worldwide do not agree with its results
scientists need expensive equipments to verify its results
its results remain unchanged over a long period of time
its experiments contradict the old theories about the universe

The option which is the most likely reason why the Steady State Theory has been rejected by the scientific community is because scientists worldwide do not agree with its results.
The results the scientists got didn't really match with the theory they proposed, so they decided it was invalid as there was no evidence to support it. Even though the theory was quite popular in the 20th century, still it turned out to be inconclusive.