People with cystic fibrosis inherit defective genetic information and can not produce normal CFTR proteins.  Scientists have used gene therapy to insert normal DNA segments that code for the missing CFTR protein into the lung cells of people with cystic fibrosis.  Which statement does not describe a result of this therapy?

(a) Altered lung cells can produce the normal CFTR protein.
(b) Altered lung cells can divide to produce other lungs cells with the normal CFTR gene.
(c) The normal CFTR gene may be expressed in altered lung cells.
(d) Offspring of someone with altered lung cells will inherit the normal CFTR gene.