When securing the operation of an inert gas system, the final step should be _________.

Correct Answer: Option B — secure the salt water supply to the scrubber

Securing the salt water supply to the scrubber is the final step to ensure all internal components are fully flushed and cooled. This prevents residual acidic combustion products from corroding the scrubber internals and ensures the system is left in a safe, clean condition for the next operational cycle.