What color must the last 1.0 meter (3.3 feet) of piping before the vessel vapor connection be painted?

Correct Answer: Option C — red/yellow/red

33 CFR 154.810 requires the last 1.0 meter of piping before the vessel vapor connection to be painted with alternating red, yellow, and red bands. This high-visibility marking scheme is a standardized safety requirement designed to clearly identify vapor recovery connections and prevent accidental connection to liquid cargo lines.