Which of the following types of gene therapy do you think might be most restricted in the United States today?

Which of the following types of gene therapy do you think might be most restricted in the United States today?A. Inserting a normal gene into a liver cell to replace a non-functional gene for a liver protein.B. Inactivating a gene required for HIV infection in precursor cells that give rise to new immune cells in the blood.C. Correcting a mutation that causes hemophilia in the egg cell of a woman, so that none of her children will ever have the disease.D. Clinical trials for a gene therapy of liver disease that involve human subjects.