Gene therapy is a way doctors can treat a disease by inserting a healthy gene into a patient's cells, instead of using drugs or surgery. the new version of the gene the patient's body fight the disease. gene therapy is a) considered a very safe technique. b) still being researched and is not used on humans. c) still being tested and is used for diseases that have no cure. d) used frequently today to prevent many common childhood diseases.

The answer is; C

Gene therapy is still not considered safe and has not been approved for humans, especially due to errors in inserting of DNA at the target site and also random relapse of the DNA from its inserted site. Gene therapy, however, can be sanctioned when its benefits outweigh its risks such as in terminally ill patients - with the approval of the patient and local relevant policies/authorities. Gene therapy, today, is being tested with innovative tools called CRISPR/Cas9.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.