When dealing with fuel gas systems, it is recommended that the investigator seek _____.

When dealing with fuel gas systems, it is highly advisable for investigators to seek expert assistance due to the inherent complexity and potential dangers associated with these systems. Fuel gas systems often involve highly flammable materials and can pose severe risks, including explosions or fires if improperly handled. Experts possess the specialized knowledge and technical skills necessary to safely assess and manage these systems, ensuring proper procedures are followed to mitigate any hazards.

Furthermore, fuel gas systems require a thorough understanding of codes, regulations, and safety protocols which are well beyond the expertise of an untrained individual. Engaging with professionals ensures that any investigation conducted adheres to industry standards and safeguards both the investigator and the public in the vicinity. This approach contrasts sharply with the other options, which may imply unsafe practices or a lack of necessary expertise. Seeking expert assistance is the most responsible and effective course of action in handling fuel gas systems safely and effectively.