Your answer is going to be B
Stem cells are a class of undifferentiated cells that are able to differentiate into special cell types.
They are important because they represent an area in medicine, because they have the potential to regenerate and repair damaged tissue.
Not all stem cells come from embryos but also bone marrow, your teeth and other places.
The answer is C, I just did that question, the answer should be like he pointed to the execution of the french royalty.
