Answer: A. National Organ Transplant Act of 1984
Explanation: The National Organ Transplant Act of 1984 established the Organ Procurement and Transplant Network (OPTN), a national system to address fair allocation of organs for transplant. Patients on the waiting list are in end-stage organ failure and have been evaluated by a transplant physician at U.S. hospitals where organ transplants are performed.
The OPTN is operated by the nonprofit United Network for Organ Sharing (UNOS). UNOS committees and a board of directors composed of transplant physicians, government officials, immunology specialists, organ donation experts, donor families, transplant recipients, and members of the public have created rules for organ allocation.