Stem Cell Procedures Are Tested and Safe

Stem cell procedures are tested and safe. True or False?

A) False. Transplanted stem cells can be rejected and incorrect dosages may cause tumors.
B) True. Scientists and doctors have successfully used stem cell treatments enough that they are confident in their safety at this point.
C) False. Stem cell treatments generally go well, but it is very difficult to get the stem cells cultured in the first place.
D) True. Veterinarians are now routinely using stem cell treatments on animals and it's assumed that they will work in people just as well, and they have so far.
E) False. Stem cell treatments have worked in animals but have so far tended to aggravate symptoms in people.