How Does a Scientist Get the Corrected Version of a Gene

Multiple Choice

How does a scientist get the corrected version of a gene into the cells of a gene therapy patient?

A) It is delivered with a modified virus.
B) It is directly injected with a microscopic hypodermic needle.
C) It is attached to a food molecule, such as glucose and is then ingested by the individual.
D) It is attached to the surface of microscopic beads and is then shot into the individual (i.e., shotgun method) .