What Is Therapeutic Cloning

What is therapeutic cloning?

A) A nucleus from a healthy cell is taken from a patient and injected into an egg cell with no nucleus, and this cell develops into an embryo with stem cells that "match" the patient and can be used in therapies without risk of transplant rejection.
B) An egg or sperm cell is taken from the patient and combined with an egg or sperm cell with its nucleus removed such that an embryo develops with stem cells that "match the patient" and be used in therapies without risk of transplant rejection.
C) DNA from a patient is extracted and injected into the egg from a similar animal (most often a primate or pig) , and the embryo that develops has stem cells which "match" the patient and can be used in therapies without the risk of transplant rejection.
D) "Spare" embryos are saved by parents, and the stem cells in these can be used to treat potential ailments in their children without risk of transplant rejection.
E) Experimental treatments which might work on a patient are first tried using a culture of their cells in the lab. This minimizes risk of the treatment on the actual patient if it appears to work in the lab setting.