Which of the Following Statements, If Any, Is False

Which of the following statements, if any, is false?

A) Gene therapy involves the direct genetic modification of the cells of a person (or animal model) to achieve a therapeutic goal.
B) Current gene therapy is directed at modifying somatic cells.
C) The only successful gene therapies are those in which cells are removed from a patient, genetically modified, and then returned to the patient.
D) Gene therapy successes have largely involved treatment of recessively inherited disorders.