The Use of Embryonic Stem Cells Has Generated Great Controversy

The use of embryonic stem cells has generated great controversy in the United States because

A) embryonic stem cell products have a limited availability and seem to be more commonly distributed to those who can better afford to pay the high costs.
B) the treatments are considered experimental and are routinely rejected by insurance carriers.
C) such cells can only be harvested from human embryos, which many citizens believe have moral status and a unique life potential.
D) the U.S. government has enacted and maintains severe prohibitions regarding any research with these tissues.