Which of the Following Is an Assisted Reproductive Technology

Which of the following is an assisted reproductive technology?

A) producing human insulin in bacteria
B) a couple conceive using sperm from a sperm bank
C) a man donates part of his liver to his daughter, who has cystic fibrosis
D) a woman has breast reduction surgery to alleviate back pain
E) a boy with a form of hereditary blindness receives injections of the wild type gene in his retinas to restore his vision