Gene therapy is an integral part of genome projects. It includes the correction of abnormal genes responsible for diseases. Which of these is an application of gene therapy? A) The removal of cells with abnormal genes from the body by surgical methods. B) Designing drugs to inhibit the function of a protein coded by an abnormal gene. C) The introduction of a new gene that can bind with the abnormal gene to inhibit its action. D) The inhibition of all the genes associated with the abnormal gene to regulate their actions.