The Nurse Is Participating in a Clinical Trial Involving in Vitro

The nurse is participating in a clinical trial involving in vitro gene therapy in the treatment of a patient with adenosine deaminase (ADA) deficiency.What should the nurse explain to the patient is involved in this method of gene therapy?

A) Direct instillation of modified viruses carrying the desired genes into the patient
B) Direct microinjection of DNA into cells that have been removed from the body and reinfused
C) Removal of lung cells from the body,which are altered genetically and reinfused into the patient's blood
D) Removal of cells from the body,which are exposed to modified viruses containing desired genes and reinfusion of the cells back into the body