Answer:
research should be capable of producing results that do not support the hypothesis.
Explanation:
In simple words, Karl Popper introduced the Falsification Rule as a method of distinguishing science versus non-science. It implies that a hypothesis should be capable to be verified and perhaps shown wrong in order to be deemed scientific. Viewing a black swan, for instance, can disprove the idea that "all swans remain white."
Thus, the last statement is correct.