Final answer:
The correct answer is A. Stem cells. These cells have the potential to differentiate into various cell types, including neurons, making them suitable for treating neurological dysfunctions.
Step-by-step explanation:
The fetal cells that might be used to treat some forms of neurological dysfunction are often referred to as stem cells. While glial cells, including astrocytes, oligodendrocytes, microglia, and ependymal cells, are integral parts of the nervous system, they serve primarily as supporting cells. Stem cells, on the other hand, have the potential to differentiate into various cell types, which can be critical in regenerative medicine and treating disorders of the nervous system such as through the transplantation of fetal or embryonic stem cells, or using multipotent stem cells such as those from umbilical cord blood or baby teeth that are sometimes banked by parents.