To Treat Severe Combined Immunodeficiency (SCID)by Gene Therapy,a Patient's White

Multiple Choice

To treat severe combined immunodeficiency (SCID) by gene therapy,a patient's white blood cells are removed,followed by the delivery of a normal gene into the cells.The altered cells are then returned to the patient's body.This is an example of _____ gene therapy.

A) enhancement
B) germ-line
C) viral
D) in vivo
E) ex vivo