A retort must always be operated in which two manners?

The correct answer indicates that a retort must be operated in a sanitary and professional manner. This is crucial due to the nature of the tasks performed in a retort, which is primarily used for cremation. Maintaining a sanitary environment ensures that the processes conducted are safe and free from contamination, thus upholding health standards and protecting the dignity of the deceased.

Operating a retort in a professional manner reflects adherence to the ethical and legal standards expected of funeral service professionals. This includes following regulations, respecting the deceased, and providing compassionate service to the bereaved families. A professional approach also encompasses the proper use of equipment and adherence to operational protocols to ensure that the cremation process is conducted with respect and dignity.

In summary, the combination of sanitation and professionalism is vital for the integrity of the cremation process, the health and safety of personnel, and the trust of the families served by funeral professionals.