Final answer:
Scientists found that somatic cells can be reprogrammed to a pluripotent state, holding potential for organ regrowth and regenerative therapies. Hence the correct option is option D.
Step-by-step explanation:
Scientists discovered that somatic cells can be reprogrammed back to a pluripotent state, enabling potential organ regrowth. This is significant because it suggests that cells from a patient's body could potentially be used to regenerate damaged tissues or grow new organs, offering a source for regenerative therapy without the ethical issues associated with embryonic stem cells.
The reprogramming of somatic cells to pluripotent stem cells is facilitated by the introduction of specific transcription factors that re-activate genes associated with the undifferentiated state.