Why do classification systems change over time?

A. Scientists find new evidence in their studies.

B. Scientists use old methods of classification.

C. Scientists repeat experiments and find no changes.

D. Scientists find similar evidence to previous work.

A. Scientists find new evidence in their studies.

When scientists do find new empirical evidence to revise the current findings, they would do so. They would correct them which by either supporting and implying more results to the current study, or negating the study by abandoning it then resulting to a more useful approach.