The correct answer is D) All of the above. When working with gas turbine synthetic lube oil, it is essential to observe all of the safety measures listed in the answer choices. Synthetic lube oils can be hazardous if not handled properly. Thoroughly washing any area of skin contact is crucial to prevent skin irritation or absorption. Avoiding prolonged inhalation of vapors is necessary to prevent respiratory issues. Wearing eye protection and rubber gloves is important to protect the eyes and hands from direct exposure to the oil. Failing to observe any of these safety measures can put the user at risk, so it is best to follow all of the recommended precautions.