Gene Therapy Involves Transferring Desired Genes into Diseased Cells

Gene therapy involves transferring desired genes into diseased cells.Typically this is performed only on nonreproductive cells somatic cellsbecause there are ethical concerns in using germ-line gene therapy.Why?

A) This could alter the gene pool.
B) Germ-line gene therapy is technically impossible.
C) Both of the above are concerns.
D) There are no ethical concerns.