Respuesta :
The answer is D. They are based on current knowledge.
Such limitation is common to all scientific models, they are all based on current knowledge, which gives us a limitated vision of reality. However, science advances when it integrates new knowledge and research to the existing one, this new knowledge can verify what we thought we knew, it can contradict it or it can deepen it. In any case, it gives us a more accurate vision of reality.